Touch structure, display panel, and electronic device

ABSTRACT

A touch structure, a display panel, and an electronic device. In the touch structure, the first touch sub-electrodes and the first connecting electrodes are alternately arranged and sequentially connected to form a first touch electrode; the second touch sub-electrodes of the first grid layer and the first touch sub-electrodes are at intervals, and the two respectively include multiple first metal grids; the second connecting electrodes are connected to adjacent second touch sub-electrodes to form a second touch electrode extending in a second direction. A first grid row of each second connecting electrode includes multiple second metal grids arranged in a first direction, a second grid row thereof is adjacent to the first grid row and includes a second metal grid; all the second metal wires of the second grid row close to the first grid row are second metal wires shared with the first grid row.

The application claims priority to the Chinese patent application No.202010941621.5, filed on Sep. 9, 2020, the entire disclosure of which isincorporated herein by reference as part of the present application.

TECHNICAL FIELD

At least one embodiment of the present disclosure relates to a touchstructure, a display panel and an electronic device.

BACKGROUND

The user interface with touch function is widely used in variouselectronic devices, for example, display devices. The touch structureused to realize the touch function includes a touch electrode structure,the arrangement of the touch electrode structure is an important factoraffecting the user experiences.

SUMMARY

At least one embodiment of the present disclosure provides a touchstructure, the touch structure includes a first metal grid layer and asecond metal grid layer, an insulation layer is provided between thefirst metal grid layer and the second metal grid layer, the first metalgrid layer includes a plurality of first metal grids defined by aplurality of first metal lines, and the second metal grid layercomprises a plurality of second metal grids defined by a plurality ofsecond metal lines, shapes of each of the plurality of first metal gridsand each of the second metal grids are both polygons; the first metalgrid layer includes a plurality of first touch sub-electrodes and aplurality of first connection electrodes along a first direction, theplurality of first touch sub-electrodes and the plurality of firstconnection electrodes are alternately distributed one by one and areelectrically connected in sequence to constitute a first touch electrodeextending along the first direction; the first metal grid layer furtherincludes a plurality of second touch sub-electrodes provided in sequencealong a second direction and spaced apart from each other, and the firstdirection intersects the second direction; each of the plurality offirst touch sub-electrodes and each of the second touch sub-electrodesare spaced apart from each other, and respectively include a pluralityof first metal grids; the second metal grid layer includes a pluralityof second connection electrodes spaced apart from each other, each ofthe plurality of second connection electrodes is electrically connectedwith adjacent second touch sub-electrodes through a plurality of vias inthe insulation layer, so as to electrically connect the adjacent secondtouch sub-electrodes to form a second touch electrode extending in thesecond direction; each of the plurality of second connection electrodesincludes a first metal grid row and a second metal grid row along thesecond direction. The first metal grid row includes a plurality of thesecond metal grids arranged along the first direction; the second metalgrid row is adjacent to and connected with the first metal grid row, andcomprises at least one second metal grid among the plurality of secondmetal grids arranged along the first direction; a count of the at leastone second metal grid in the second metal grid row is less than or equalto a count of the second metal grids in the first metal grid row, andall the second metal lines of the at least one second metal grid in thesecond metal grid row close to the first metal grid row are sharingsecond metal lines shared with the second metal grid in the first metalgrid row.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the first metal grid row is electricallyconnected with the second touch sub-electrode adjacent to the firstmetal grid row, and orthographic projections of the sharing second metallines shared with the second metal grid in the first metal grid row onthe first metal grid layer overlap with the first metal lines.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the count of the second metal grids in thefirst metal grid row is 2, and the count of the at least one secondmetal grid in the second metal grid row is 1.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the plurality of vias comprise a first via,and the first metal grid row is electrically connected with one of twosecond touch sub-electrodes adjacent to the second connection electrodein which the first metal grid row is located through the first via.

For example, in the touch structure provided by at least one embodimentof the present disclosure, orthographic projections of a plurality ofsecond metal lines of the second metal grids of the first metal grid rowon the first metal grid layer respectively overlap with a plurality offirst metal lines of the first metal grids of the second touchsub-electrode, so that the second metal grids has a plurality ofvertices overlapped with the first metal grids, and the plurality ofvertices comprise a plurality of connection vertices, the first via iscorrespondingly arranged at the plurality of connection vertices.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the shapes of each of the plurality of firstmetal grids and each of the second metal grids are both hexagons; theplurality of second metal lines of the second metal grids of the firstmetal grid row respectively overlap with four first metal lines of anedge first metal grid of a second touch sub-electrode adjacent to thefirst metal grid row in a direction perpendicular to the second metalgrid layer, so that the edge first metal grid has five verticesoverlapped with the second metal grids; the four first metal linessequentially connect the five vertices to be in a W shape, the fourfirst metal lines respectively intersect both the first direction andthe second direction, and at least one of the five vertices is theconnection vertex.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the plurality of the second metal grids ofthe first metal grid row are first edge second metal grids at a firstedge of the second connection electrode, and are located at a first endof the second connection electrode in the second direction, and areelectrically connected with the edge first metal grid of the secondtouch sub-electrode adjacent to the first metal grid row.

For example, in the touch structure provided by at least one embodimentof the present disclosure, each of the plurality of second connectionelectrodes along the second direction further comprises: a third metalgrid row and a fourth metal grid row. The third metal grid row is on aside of the second metal grid row away from the first metal grid row,and comprising a plurality of the second metal grids arranged along thefirst direction; and the fourth metal grid row is on a side of the thirdmetal grid row close to the second metal grid row, adjacent to andconnected with the third metal grid row, and comprising at least onesecond metal grid among the plurality of second metal grids arrangedalong the first direction; a count of the at least one second metal gridin the fourth metal grid row is less than or equal to a count of thesecond metal grids in the third metal grid row, and all the second metallines of the at least one second metal grid in the fourth metal grid rowclose to the third metal grid row are sharing second metal lines sharedwith the second metal grid in the third metal grid row, the second metalgrid of the third metal grid row is a second edge metal grid of thesecond connection electrode at a second edge of the second connectionelectrode, is located at a second end of the second connection electrodein the second direction, and is electrically connected with the edgefirst metal grid of the second touch sub-electrode adjacent to the thirdmetal grid row, and the second end is opposite to the first end in thesecond direction; the plurality of vias comprise a second via, and thethird metal grid row is electrically connected with other one of the twosecond touch sub-electrodes adjacent to the second connection electrodein which the third metal grid row is located through the second via.

For example, in the touch structure provided by at least one embodimentof the present disclosure, orthographic projections of the sharingsecond metal lines shared with the second metal grid in the third metalgrid row on the first metal grid layer do not overlap with the firstmetal lines, or the orthographic projections of the sharing second metallines shared with the second metal grid in the third metal grid row onthe first metal grid layer overlap with the first metal lines.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the count of the second metal grids in thethird metal grid row is 2, and the count of the at least one secondmetal grid in the fourth metal grid row is 1.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the second connection electrode furthercomprises at least one intermediate metal grid row between the secondmetal grid row and the fourth metal grid row, each row of the at leastone intermediate metal grid row comprises at least one second metal gridamong the plurality of second metal grids.

For example, in the touch structure provided by at least one embodimentof the present disclosure, a count of the at least one second metal gridin each row of the at least one intermediate metal grid row is 1.

For example, in the touch structure provided by at least one embodimentof the present disclosure, each of the plurality of second connectionelectrodes along the second direction further comprises: a third metalgrid row and a third metal grid row. The third metal grid row is on aside of the second metal grid row away from the first metal grid row,adjacent to the second metal grid row, and comprises plurality of thesecond metal grids arranged along the first direction; the count of theat least one second metal grid in the second metal grid row is less thanor equal to a count of the second metal grids in the third metal gridrow, and all second metal lines of the at least one second metal grid inthe second metal grid row close to the third metal grid row are sharingsecond metal lines shared with the second metal grid in the third metalgrid row, the second metal grids of the third metal grid row is a secondedge metal grid of the second connection electrode at a second edge ofthe second connection electrode, is located at a second end of thesecond connection electrode in the second direction, and is electricallyconnected with an edge first metal grid of the second touchsub-electrode adjacent to the third metal grid row, and the second endis opposite to the first end in the second direction; the plurality ofvias comprise a second via, and the third metal grid row is electricallyconnected with other one of the two second touch sub-electrodes adjacentto the second connection electrode in which the third metal grid row islocated through the second via.

For example, in the touch structure provided by at least one embodimentof the present disclosure, a pattern of each of the plurality of secondconnection electrodes is symmetrical with respect to a symmetry axisextending along the first direction.

For example, in the touch structure provided by at least one embodimentof the present disclosure, each of the second metal grids comprises atleast two vertical edges extending along the second direction, andorthographic projections of the at least two vertical edges on the firstmetal grid layer do not overlap with the first metal line.

For example, in the touch structure provided by at least one embodimentof the present disclosure, adjacent second touch sub-electrodes amongthe plurality of second touch sub-electrodes are electrically connectedthrough two of the second connection electrodes, and the two of thesecond connection electrodes are spaced apart from each other; anorthographic projection of each of the plurality of first connectionelectrodes on the second metal grid layer is in a gap between the two ofthe second connection electrodes connecting the adjacent second touchsub-electrodes.

For example, in the touch structure provided by at least one embodimentof the present disclosure, each of the plurality of first touchsub-electrodes is electrically connected with an adjacent firstconnection electrode through at least one first connection lineconstituted by a plurality of first metal lines connected end to end insequence; an orthographic projection of the first connection line on thesecond metal grid layer respectively overlaps with a plurality of secondmetal lines in the second connection electrode, and the first connectionline at least partially overlaps with an orthographic projection of thesharing second metal line on the first metal grid layer.

For example, in the touch structure provided by at least one embodimentof the present disclosure, a plurality of the first metal lines locatedin a boundary region between adjacent first touch sub-electrode and thesecond touch sub-electrode respectively comprise a plurality ofopenings, each of the plurality of openings divides the first metal lineinto two first metal segments, one of the two first metal line segmentsbelongs to the first touch sub-electrode and other one of the two firstmetal line segments belongs to the second touch sub-electrode, so thatthe adjacent first touch sub-electrode and the second touchsub-electrode are insulated from each other.

At least one embodiment of the present disclosure provides a touchstructure, the touch structure includes a plurality of touchsub-electrodes spaced apart from each other and a dummy electrode. Thedummy electrode is embedded in at least one touch sub-electrode of theplurality of touch sub-electrodes and spaced apart from the touchsub-electrode in which the dummy electrode is embedded to insulate eachother; the at least one touch sub-electrode comprises a strip-shapedchannel and a main body part surrounding the dummy electrode and thechannel, and the strip-shaped channel passes through the dummyelectrode, and two ends of the strip-shaped channel in an extensiondirection of the strip-shaped channel are connected with the main bodypart.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the channel comprises at least one narrowpart and at least one wide part which are alternately arranged andsequentially connected in the extension direction of the channel, and awidth of each of the at least one narrow part in a directionperpendicular to the extension direction of the channel is less than awidth of each of the at least one wide part in direction perpendicularto the extension direction of the channel.

For example, in the touch structure provided by at least one embodimentof the present disclosure, a ratio of a length of each of the at leastone narrow part in the extension direction of the channel to the widthof each of the at least one narrow part is greater than a ratio of alength of each of the at least one wide part in the extension directionof the channel to the width of each of the at least one wide part.

For example, in the touch structure provided by at least one embodimentof the present disclosure, a plurality of wide parts are arranged atequal intervals, and lengths of a plurality of narrow parts are equal toeach other.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the at least one touch sub-electrodecomprises a plurality of the strip-shaped channels, and the plurality ofstrip-shaped channels comprise: a strip-shaped first channel and astrip-shaped second channel. The strip-shaped first channel extendssubstantially along a first extension direction; the strip-shaped secondchannel extends substantially along a second extension direction andintersecting the first channel; the dummy electrode comprises at leastfour parts separated from each other by the first channel and the secondchannel.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the at least one touch sub-electrodecomprises a plurality of the strip-shaped channels, and the plurality ofstrip-shaped channels comprise: a plurality of strip-shaped firstchannels and a plurality of strip-shaped second channels. The pluralityof strip-shaped first channels respectively extends substantially alonga first extension direction and spaced apart from each other; theplurality of strip-shaped second channels respectively extendssubstantially along a second extension direction and spaced apart fromeach other; each of the strip-shaped second channels intersects each ofthe plurality of strip-shaped first channels, and the dummy electrodecomprises a plurality of parts separated from each other by theplurality of strip-shaped first channels and the plurality ofstrip-shaped second channels.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the first extension direction isperpendicular to the second extension direction.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the plurality of strip-shaped first channelscomprise two first channels, the plurality of strip-shaped secondchannels comprise two second channels, and the dummy electrode comprisesat least nine parts separated from each other by the two first channelsand the two second channels.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the at least one touch sub-electrodecomprises a communication part, the plurality of strip-shaped channelsare electrically connected with each other through the communicationpart, and the plurality of parts of the dummy electrode surround thecommunication part.

For example, in the touch structure provided by at least one embodimentof the present disclosure, each of the plurality of channels comprises aplurality of narrow parts and a plurality of wide part alternatelyarranged and sequentially connected in an extension direction of theeach of the plurality of channels, and a width of each of the pluralityof narrow parts in a direction perpendicular to the extension directionof the channel is less than a width of each of the plurality of wideparts in the direction perpendicular to the extension direction of thechannel, the narrow part of the first channel intersects the narrow partof the second channel.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the narrow part of the first channel has anintersection point with the narrow part of the second channel, the firstchannel comprises a first wide part and a second wide part that arerespectively on two sides of the intersection point and adjacent to theintersection point, and the second channel comprises a third wide partand a fourth wide part that are respectively on two sides of theintersection point and adjacent to the intersection point; distancesfrom the first wide part, the second wide part, the third wide part andthe fourth wide part to the intersection point are equal.

For example, in the touch structure provided by at least one embodimentof the present disclosure, a shape of an outer contour of an overallstructure constituted by the dummy electrode and the strip-shapedchannel is a first polygon; the two ends of the channel are respectivelyclose to two adjacent edges of the first polygon, or the two ends of thechannel are respectively close to two opposite edges of the firstpolygon, or the two ends of the channel are respectively close to twonon-adjacent vertices of the first polygon.

For example, in the touch structure provided by at least one embodimentof the present disclosure, a shape of an outer contour of the main bodypart is a second polygon, and the second polygon and the first polygonare similar polygons.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the strip-shaped channel is in a straightstrip substantially; a shape of an outer contour of an overall structureconstituted by the dummy electrode and the channel is substantially afirst polygon, the channel is parallel to at least one edge of the firstpolygon, or the channel is not parallel to any edge of the firstpolygon.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the strip-shaped channel is in a curved stripshape or in a fold line shape.

For example, in the touch structure provided by at least one embodimentof the present disclosure, at least one strip-shaped channel comprises afirst segment and a second segment that are arranged along the extensiondirection of the at least one strip-shaped channel, the first segmentand the second segment are substantially parallel to each other, and thefirst segment and the second segment are electrically connected througha metal connection line.

For example, in the touch structure provided by at least one embodimentof the present disclosure, a ratio of a maximum size of a region crossedby an entirety of the dummy electrode to a maximum size of the touchsub-electrode in which the dummy electrode is located in a samedirection is greater than or equal to 0.4 and less than or equal to 0.6;a ratio of a minimum width of the channel to the maximum size of theregion crossed by the entirety of the dummy electrode is greater than orequal to 0.03 and less than or equal to 0.1.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the at least one touch sub-electrode furthercomprises a plurality of interdigital structures connected with the mainbody part, and the plurality of interdigital structures are distributedaround the main body part and protrude from the main body part in adirection away from the main body part; the extension direction of thechannel is parallel to an extension direction of at least a part of theinterdigital structures in the plurality of interdigital structures, orthe extension direction of the channel of the touch sub-electrode is notparallel to the extension direction of at least a part of theinterdigital structures in the plurality of interdigital structures; theat least a part of the interdigital structure protrudes from an edge ofan outer contour of the main body part close to two ends of the channel.

For example, in the touch structure provided by at least one embodimentof the present disclosure, in the extension direction of the channel,the two ends of the strip-shaped channel at least partially overlap withthe interdigital structure protruding from the edge of the main bodyclose to the two ends of the channel, and at least a part of an edge ofthe channel along the extension direction of the channel is parallel toa part of an edge of the interdigital structure.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the touch structure comprises a firstelectrode layer and a second electrode layer, and an insulation layer isprovided between the first electrode layer and the second electrodelayer; the plurality of touch sub-electrodes comprise a plurality offirst touch sub-electrodes and a plurality of second touchsub-electrodes, and the touch structure further comprises a plurality offirst connection electrodes and a plurality of second connectionelectrodes; the plurality of first touch sub-electrodes and theplurality of first connection electrodes are all in the first electrodelayer and arranged along a first direction, the plurality of first touchsub-electrodes and the plurality of first connection electrodes arealternately distributed one by one and electrically connected insequence to constitute a first touch electrode extending along the firstdirection; the plurality of second touch sub-electrodes are in the firstelectrode layer, and are arranged in sequence along a second directionand spaced apart from each other, the first direction intersects thesecond direction, and each of the plurality of first touchsub-electrodes and each of the second touch sub-electrodes are spacedapart from each other; the plurality of second connection electrodes arein the second electrode layer and are spaced apart from each other, andeach of the plurality of second connection electrodes is electricallyconnected with adjacent second touch sub-electrodes through vias in theinsulation layer, so as to electrically connect the adjacent secondtouch sub-electrodes to constitute a second touch electrode extending inthe second direction; the dummy electrode is embedded in the first touchsub-electrode and/or embedded in the second touch sub-electrode.

For example, in the touch structure provided by at least one embodimentof the present disclosure, a shape of an outer contour of an overallstructure constituted by the dummy electrode and the channel is anirregular polygon; a first end of the outer contour of the dummyelectrode and a second end of the outer contour of the dummy electrodethat are opposite to each other in the second direction are respectivelyright opposite to second connection electrodes adjacent in the seconddirection, and respectively have a first groove and a second groove; thefirst groove is recessed toward the second end of the outer contour ofthe dummy electrode, and the second groove is recessed toward the firstend of the outer contour of the dummy electrode; a third end of theouter contour of the dummy electrode and a fourth end of the outercontour of the dummy electrode that are opposite to each other in thefirst direction are respectively opposite to the first connectionelectrode, and respectively have a third groove and a fourth groove; thethird groove is recessed toward the fourth end, and the fourth groove isrecessed toward the third end.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the outer contour of the dummy electrodecomprises a first protrusion in the first groove and a second protrusionin the second groove; the first protrusion protrudes in a direction awayfrom the second end of the outer contour of the dummy electrode, and thesecond protrusion protrudes in a direction away from the first end ofthe outer contour of the dummy electrode.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the plurality of touch sub-electrodes and thedummy electrode are in a same metal grid layer, the metal grid layercomprises a plurality of metal grids defined by a plurality of metallines, and each selected from a group consisting of the main body part,the channel and the dummy electrode respectively comprises a pluralityof the metal grids.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the plurality of touch sub-electrodes and thedummy electrode are in a same metal grid layer, the metal grid layercomprises a plurality of metal grids defined by a plurality of metallines, and the communication part comprises a plurality of the metalgrids.

For example, in the touch structure provided by at least one embodimentof the present disclosure, in the at least one touch sub-electrodeembedded with the dummy electrode, each part of the dummy electrode hasa boundary region with the touch sub-electrode, a plurality of the metallines in the boundary region respectively comprise a plurality ofopenings, each of the plurality of openings separates the metal line, inwhich the each of the plurality of openings is located, into two metalsegments, and one of the two metal segments belongs to the touchsub-electrode, and other one of the two metal segments belongs to thedummy electrode, so that the dummy electrode is insulated from the touchsub-electrode.

For example, in the touch structure provided by at least one embodimentof the present disclosure, the channel comprises at least two conductorlines composed of a plurality of the metal lines connected with eachother, the conductor lines pass through the dummy electrode and two endsof each of the conductor lines in extension direction of each of theconductor line are respectively connected with the main body.

For example, in the touch structure provided by at least one embodimentof the present disclosure, at least part of each channel comprises atleast one metal grid arranged in a width direction of the each channel,and the width direction is perpendicular to the extension direction ofthe each channel.

For example, in the touch structure provided by at least one embodimentof the present disclosure, each channel comprises a plurality of themetal grids arranged in series along the extension direction of the eachchannel; or, each channel comprises a plurality of the metal gridsarranged along the extension direction of the each channel and a metalconnection line connecting at least two adjacent metal grids of theplurality of the metal grids.

For example, in the touch structure provided by at least one embodimentof the present disclosure, in a case that the touch structure comprisesa first electrode layer and a second electrode layer, the firstelectrode layer is a first metal grid layer, and the second electrodelayer is a second metal grid layer; the first metal grid layer comprisesa plurality of first metal grids defined by a plurality of first metallines, the second metal grid layer comprises a plurality of second metalgrids defined by a plurality of second metal lines, both a shape of eachof the plurality of first metal grids and a shape of each of the secondmetal grids are polygons; each selected from the group consisting of themain body part, the channel and the dummy electrode respectivelycomprises a plurality of the first metal grids; each of the plurality ofsecond connection electrodes comprises a plurality of the second metalgrids.

At least an embodiment of the present disclosure further provides atouch display panel, and the touch display panel comprises a basesubstrate, a display structure and any one of the touch structuresprovided by the embodiments of the present disclosure that are stackedon the base substrate.

At least an embodiment of the present disclosure further provides anelectronic device, and the electronic device comprises any one of thetouch structures provided by the embodiments of the present disclosureor any one of the touch display panels provided by the embodiments ofthe present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to demonstrate clearly technical solutions of the embodimentsof the present disclosure, the accompanying drawings in relevantembodiments of the present disclosure will be introduced briefly. It isapparent that the drawings may only relate to some embodiments of thedisclosure and not intended to limit the present disclosure.

FIG. 1 is a schematic diagram of the working principle of a touchstructure;

FIG. 2 is a schematic diagram of a touch structure provided by anembodiment of the present disclosure;

FIG. 3 is an enlarged schematic diagram of a part in the frame in FIG. 2;

FIG. 4A is an enlarged schematic diagram of a region A in FIG. 3 ;

FIG. 4B is a cross-sectional diagram of FIG. 4A taken along the sectionline B-B′;

FIG. 4C is a schematic diagram of a vertex of a second metal grid notprovided with a via and a vertex provided with a via;

FIG. 4D is a cross-sectional diagram of FIG. 4A taken along the sectionline D-D′;

FIG. 5 shows a first touch electrode layer in FIG. 4A;

FIG. 6A shows a second touch electrode layer in FIG. 4A;

FIG. 6B is a schematic diagram of another second touch electrode layerprovided by an embodiment of the present disclosure;

FIG. 6C is a schematic diagram of further another second touch electrodelayer provided by an embodiment of the present disclosure;

FIG. 7A and FIG. 7B respectively show two examples of enlarged schematicdiagrams of a region B in FIG. 2 ;

FIG. 7C is a schematic diagram of another first touch electrode layerprovided by an embodiment of the present disclosure;

FIG. 7D is a schematic diagram of further another first touch electrodelayer provided by an embodiment of the present disclosure;

FIG. 8A is a first structural diagram of a dummy electrode embedded in atouch self-electrode provided by an embodiment of the presentdisclosure;

FIG. 8B is a second structural diagram of a dummy electrode embedded ina touch self-electrode provided by an embodiment of the presentdisclosure;

FIG. 8C is a third structural diagram of a dummy electrode embedded in atouch self-electrode provided by an embodiment of the presentdisclosure;

FIG. 8D is a fourth structural diagram of a dummy electrode embedded ina touch self-electrode provided by an embodiment of the presentdisclosure;

FIG. 8E is a fifth structural diagram of a dummy electrode embedded in atouch self-electrode provided by an embodiment of the presentdisclosure;

FIG. 8F is a sixth structural diagram of a dummy electrode embedded in atouch self-electrode provided by an embodiment of the presentdisclosure;

FIG. 8G is a seventh structural diagram of a dummy electrode embedded ina touch self-electrode provided by an embodiment of the presentdisclosure;

FIG. 8H is an enlarged schematic diagram of a part C in FIG. 8G;

FIG. 8I is an eighth structural diagram of a dummy electrode embedded ina touch self-electrode provided by an embodiment of the presentdisclosure;

FIG. 8J is an enlarged schematic diagram of a part F in FIG. 8I;

FIG. 9A is a schematic diagram of a dummy electrode and a channellocated in a first grid layer;

FIG. 9B is an enlarged schematic diagram of a part D in FIG. 9A;

FIG. 9C is a further enlarged schematic diagram of a part E in FIG. 9B;

FIG. 9D is an enlarged schematic diagram of a part including a dummyelectrode in FIG. 9A;

FIG. 10 is a schematic diagram of a touch display panel provided by atleast one embodiment of the present disclosure;

FIG. 11A is a schematic planar diagram of a touch display panel providedby at least one embodiment of the present disclosure; and

FIG. 11B is a cross-sectional diagram taken along a section line in FIG.11A.

DETAILED DESCRIPTION

In order to make objects, technical details and advantages of theembodiments of the disclosure apparent, the technical solutions of theembodiment will be described in a clearly and fully understandable wayin connection with the drawings related to the embodiments of thedisclosure. It is apparent that the described embodiments are just apart but not all of the embodiments of the disclosure. Based on thedescribed embodiments herein, those skilled in the art may obtain otherembodiment, without any creative work, which shall be within the scopeof the disclosure.

Unless otherwise defined, all the technical and scientific terms usedherein have the same meanings as commonly understood by one of ordinaryskill in the art to which the present disclosure belongs. The terms,such as “first,” “second,” or the like, which are used in thedescription and the claims of the present disclosure, are not intendedto indicate any sequence, amount or importance, but for distinguishingvarious components. The terms, such as “comprise/comprising,”“comprise/comprising,” or the like are intended to specify that theelements or the objects stated before these terms encompass the elementsor the objects and equivalents thereof listed after these terms, but notpreclude other elements or objects. The terms, such as“connect/connecting/connected,” “couple/coupling/coupled” or the like,are not limited to a physical connection or mechanical connection, butmay comprise an electrical connection/coupling, directly or indirectly.The terms, “inside,” “outside,” “on,” “under,” or the like are only usedto indicate relative position relationship, and when the position of theobject which is described is changed, the relative position relationshipmay be changed accordingly.

The drawings in the present disclosure are not drawn strictly accordingto the actual scale. The number of the first touch electrode, the secondtouch electrode, the first touch sub-electrode, the second touchsub-electrode, the first metal grid and the second metal grid in thetouch structure is not limited to the number shown in the figure. Thespecific size and the number of each structure can be determinedaccording to actual needs. The drawings described in the presentdisclosure are only structural diagrams.

Organic light emitting diode (OLED) display panel has characteristics ofself-illumination, high contrast, low energy consumption, wide viewingangle, fast response, flexible panel, wide temperature range, simplemanufacturing and so on, and therefore has broad development prospects.In order to meet diverse needs of users, it is of great significance tointegrate a variety of functions in the display panel, such as touchfunction, fingerprint recognition function and so on. For example,forming an on-cell touch structure in an OLED display panel is animplementation method, which realizes the touch function of the displaypanel by forming the touch structure on an encapsulation film of theOLED display panel.

For example, a mutual capacitive touch structure includes a plurality oftouch electrodes, the plurality of touch electrodes include a touchdriving electrode and a touch sensing electrode extending in differentdirections. The touch driving electrode Tx and touch sensing electrodeRx form mutual capacitance for touch sensing at the intersection of thetouch driving electrode Tx and the touch sensing electrode Rx. The touchdriving electrode Tx is used to input an excitation signal (touchdriving signal), and the touch sensing electrode Rx is used to output atouch sensing signal. By inputting an excitation signal to, for example,a touch driving electrode extending longitudinally, and receiving atouch sensing signal from, for example, a touch sensing electrodeextending laterally, a detection signal reflecting the capacitance valueof the coupling point (for example, the intersection) of the lateral andlongitudinal electrodes can be obtained. When a finger touches the touchscreen (such as the cover glass), it affects the coupling between thetouch driving electrode and the touch sensing electrode near the touchpoint, thus changing the mutual capacitance between the two electrodesat the intersection point, resulting in the change of the touch sensingsignal. According to the data of the two-dimensional capacitance changeof the touch screen based on the touch sensing signal, coordinates ofthe touch point can be calculated.

FIG. 1 shows a schematic diagram of the working principle of a mutualcapacitive touch structure. As shown in FIG. 1 , driven by the touchdriving circuit 130, the touch driving electrode Tx is applied with atouch driving signal, thereby generating an electric field line E, theelectric field line E is received by the touch sensing electrode Rx toform a reference capacitance. When a finger touches the touch screen110, because the human body is a conductor, part of the electric fieldline E generated by the touch driving electrode Tx is guided to thefinger to form a finger capacitance, which reduces the electric fieldline E received by the touch sensing electrode Rx. Therefore, thecapacitance value between the touch driving electrode Tx and the touchsensing electrode Rx decreases. The touch driving circuit 130 obtainsthe above capacitance value through the touch sensing electrode Rx, andcompares the above capacitance value with the reference capacitance toobtain the capacitance value change. According to the data of thecapacitance value change and in combination with the positioncoordinates of each touch capacitance, the coordinates of the touchpoint can be calculated.

In some touch structures, the touch driving electrode Tx includes aplurality of sub-electrodes electrically connected through bridges.There is an insulation layer between the bridges and the touch sensingelectrode Rx, and there is an overlapping part between each bridge andthe touch sensing electrode Rx in the direction perpendicular to thebase substrate. The larger area of the overlapping part can increase theprobability of short circuit between the touch driving electrode Tx andthe touch sensing electrode Rx because of the electrical connectionbetween the touch driving electrode Tx and the touch sensing electrodeRx, and it will cause poor touch effect, such as increasing theprobability of false alarm points and false touch, and at the same time,it will increase the power consumption of the touch circuit.

At least one embodiment of the present disclosure provides a touchstructure, the touch structure includes a first metal grid layer and asecond metal grid layer, an insulation layer is provided between thefirst metal grid layer and the second metal grid layer, the first metalgrid layer includes a plurality of first metal grids defined by aplurality of first metal lines, and the second metal grid layercomprises a plurality of second metal grids defined by a plurality ofsecond metal lines, shapes of each of the plurality of first metal gridsand each of the second metal grids are both polygons; the first metalgrid layer includes a plurality of first touch sub-electrodes and aplurality of first connection electrodes along a first direction, theplurality of first touch sub-electrodes and the plurality of firstconnection electrodes are alternately distributed one by one and areelectrically connected in sequence to constitute a first touch electrodeextending along the first direction; the first metal grid layer furtherincludes a plurality of second touch sub-electrodes provided in sequencealong a second direction and spaced apart from each other, and the firstdirection intersects the second direction; each of the plurality offirst touch sub-electrodes and each of the second touch sub-electrodesare spaced apart from each other, and respectively include a pluralityof first metal grids; the second metal grid layer includes a pluralityof second connection electrodes spaced apart from each other, each ofthe plurality of second connection electrodes is electrically connectedwith adjacent second touch sub-electrodes through a plurality of vias inthe insulation layer, so as to electrically connect the adjacent secondtouch sub-electrodes to form a second touch electrode extending in thesecond direction; each of the plurality of second connection electrodesincludes a first metal grid row and a second metal grid row along thesecond direction. The first metal grid row includes a plurality of thesecond metal grids arranged along the first direction; the second metalgrid row is adjacent to and connected with the first metal grid row, andcomprises at least one second metal grid among the plurality of secondmetal grids arranged along the first direction; a count of the at leastone second metal grid in the second metal grid row is less than or equalto a count of the second metal grids in the first metal grid row, andall the second metal lines of the at least one second metal grid in thesecond metal grid row close to the first metal grid row are sharingsecond metal lines shared with the second metal grid in the first metalgrid row.

In the touch structure provided by the embodiments of the presentdisclosure, both the overlapping area of the first metal line and thesecond metal line, and the overlapping area of the first touch electrodeand the second touch electrode can be reduced through the sharing secondmetal line, so as to reduce the mutual capacitance between the firsttouch electrode and the second touch electrode, reduce the powerconsumption of the touch circuit, and reduce the risk of connectionbetween the first metal line and the second metal line, and reduce theprobability of short circuit between the first metal line and the secondmetal line.

Exemplarily, FIG. 2 is a schematic diagram of a touch structure 40provided by an embodiment of the present disclosure. As shown in FIG. 2, the touch electrode structure 40 includes a plurality of first touchelectrodes 410 extending along the first direction D1 (one first touchelectrode 410 is shown at the position indicated by the correspondingdotted line in FIG. 2 ) and a plurality of second touch electrodes 420extending along the second direction D2 (one second touch electrode 420is shown at the position indicated by the corresponding dotted line inFIG. 2 ). For example, the first touch electrode 410 is a touch sensingelectrode Rx, and the second touch electrode 420 is a touch drivingelectrode Tx. However, the embodiments of the present disclosure do notlimit this. In other examples, the first touch electrode 410 may be atouch driving electrode Tx, and the second touch electrode 420 may be atouch sensing electrode Rx.

Each first touch electrode 410 includes a plurality of first touchsub-electrodes 411 sequentially arranged along the first direction D1and connected with each other, and each second touch electrode 420includes a plurality of second touch sub-electrodes 421 sequentiallyarranged along the second direction D2 and connected with each other. Asshown in FIG. 3 , both the main body contour of each first touchsub-electrode 411 and the main body contour of each the second touchsub-electrode 421 are in diamond shapes. In other examples, the firsttouch sub-electrode 411 and the second touch sub-electrode 421 may inother shapes, such as triangle, strip, etc.

The first touch sub-electrodes 411 adjacent in the first direction D1are electrically connected with each other through a first connectionelectrode 412 to form the first touch electrode 410, and the secondtouch sub-electrodes 421 adjacent in the second direction D2 areelectrically connected with each other through a second connectionelectrode (not shown) to form the second touch electrode 420.

Each first touch electrode 410 and each second touch electrode 420 areinsulated from each other and intersect each other to form a pluralityof touch units 400 at the intersection position, each touch unitincludes one part of each of the two first touch electrodes connectedwith each other at the intersection position and at least one part ofeach of the two second touch electrodes connected with each other at theintersection position. The right side of FIG. 2 shows an enlargedschematic diagram of a touch unit 400. As shown in the figure, eachtouch unit 400 includes a half region of each of the two first touchsub-electrodes 411 adjacent to each other and a half region of each ofthe two second touch sub-electrodes 421 adjacent to each other, that is,on average, each touch unit 400 includes a region of one first touchsub-electrode 411 and a region of one second touch sub-electrode 421,and the intersection point of the first touch sub-electrode 411 and thesecond touch sub-electrode 421 in each touch unit 400 (that is, theintersection of the first connection electrode and the second connectionelectrode) constitutes a reference point for calculating coordinates.When a finger touches the capacitive screen, the coupling between thefirst touch electrode and the second touch electrode near the touchpoint is affected, thereby changing the mutual capacitance between thetwo electrodes. The touch sensing signal changes according to thecapacitance change of the touch screen, so that the coordinates of eachtouch point can be calculated based on the reference point. For example,the area of each touch unit 400 is equivalent to the area where aperson's finger contacts the touch panel. If the area of the touch unitis too large, it may cause a touch blind spot on the panel, and if thearea of the touch unit is too small, it may cause a false touch signal.

The average length of edges of each touch unit 400 is P, which is calleda pitch of the touch structure. For example, the size range of the pitchP is 3.7 mm-5 mm, for example, about 4 mm; this is because the diameterof a human finger contacting the touch panel is about 4 mm. For example,the size of the pitch is the same as the average length of edges of eachfirst touch sub-electrode 411 and the average length of edges of eachsecond touch sub-electrode 421, and is also the same as the distancebetween the centers of two adjacent first touch sub-electrodes 411 andthe distance between the centers of two adjacent second touchsub-electrodes 421.

As shown in FIG. 2 , the first touch sub-electrode 411 and the secondtouch sub-electrode 421 respectively include a main body part and aplurality of interdigital structures 440 extending from the main bodypart. The first touch sub-electrode 411 and the adjacent second touchsub-electrode 421 are nested with each other in the first metal grid 50through the interdigital structure 440 to form mutual capacitance. Theinterdigital structure can increase the perimeter of one touchsub-electrode under the same area of one touch sub-electrode, so it caneffectively improve the mutual capacitance without increasing theself-capacitance (capacitive load) of the touch sub-electrode, so as toimprove the touch sensitivity. For example, the shape of the main bodypart may be circular or rectangular, and the shape of the interdigitalstructure includes at least one of the following shapes: parallelogram(for example, rectangle), triangle, trapezoid and hexagon.

For example, a plurality of interdigital structures 440 are distributedat the periphery of the main body part of the touch sub-electrode. Forexample, the planar shape of the main body part is rectangular, and thenumber of second interdigital structures 112 corresponding to each edgeof the main body part is in a range of 3-10, for example, 6-10. In otherexamples, the planar shape of the main body part may be circular, andthe plurality of interdigital structures 440 are uniformly distributedon the circumference of the circle.

FIG. 2 shows an enlarged schematic diagram of a touch unit 400 on theright. As shown in FIG. 2 , the first touch sub-electrodes 411 adjacentin the first direction D1 are connected through the first connectionelectrode 412 to form the first touch electrode 410 extending along thefirst direction D1, and the second touch sub-electrodes 421 adjacent inthe second direction D2 are connected through the second connectionelectrode (not showing reference number in FIG. 2 ) to form the secondtouch electrode 420 extending along the second direction D2.

FIG. 3 is an enlarged schematic diagram of a part in the frame in FIG. 2. The touch structure 40 includes a first metal grid layer 50 and asecond metal grid layer 60. An insulation layer is arranged between thefirst metal grid layer 50 and the second metal grid layer 60. Incombination with FIG. 2 and FIG. 3 , the first metal grid layer 50includes a plurality of first touch sub-electrodes 411 and a pluralityof first connection electrodes 412 arranged along the first directionD1, the plurality of first touch sub-electrodes 411 and the plurality offirst connection electrodes 412 are alternately distributed one by oneand electrically connected in sequence, to form a first touch electrode410 extending along the first direction D1, that is, along the firstdirection D1, the adjacent first touch sub-electrodes 4111 and 4112 areelectrically connected to each other through the first connectionelectrode 412 to form the first touch electrode 410 located in the firstmetal grid layer 50 as shown in FIG. 2 . The first metal grid layer 50further includes a plurality of second touch sub-electrodes 421 that aresequentially arranged along the second direction D2 and spaced apartfrom each other, and the first direction D1 intersects the seconddirection D2. Each of the plurality of first touch sub-electrodes 411and each of the second touch sub-electrodes 421 are spaced apart fromeach other, and respectively include a plurality of first metal grids.The second metal grid layer 60 includes a plurality of second connectionelectrodes 422 spaced apart from each other. Each of the plurality ofsecond connection electrodes 422 is electrically connected with adjacentsecond touch sub-electrodes 4211 and 4212 through a plurality of vias inthe insulation layer, thereby electrically connecting the adjacentsecond touch sub-electrodes 4211 and 4212, and forming the second touchelectrode 420 extending in the second direction D2 as shown in FIG. 2 .As shown in FIG. 3 , the first touch sub-electrode 411 and the secondtouch sub-electrode 421 are nested and isolated from each other in thefirst metal grid layer 50 through the interdigital structures 440 of thefirst touch sub-electrode 411 and the interdigital structures 440 of thesecond touch sub-electrode 421. As shown in FIG. 4B, the boundary linebetween the first touch sub-electrode 411 and the second touchsub-electrode 421 is serrated due to the existence of the interdigitalstructure.

FIG. 4A shows an enlarged schematic diagram of a region A in FIG. 2 andFIG. 3 , the region A is the intersection point (intersection region) ofthe first touch sub-electrode 411 and the second touch sub-electrode421, that is, a bridging region. The light grid in FIG. 4A illustratesthe first metal grid 52 in the first metal grid layer 50. The firstmetal grid layer 50 includes the first touch electrode 410 (includingthe first touch sub-electrode 411 and the first connection electrode412) and the second touch sub-electrode 421. The first touchsub-electrode 411, the first connection electrode 412 and the secondtouch sub-electrode 421 respectively include a plurality of first metalgrids 52 connected with each other; the dark grid in FIG. 4A illustratesthe second metal grid 62 in the second metal grid layer 60, the secondmetal grid layer 60 includes a second connection electrode 422, and thesecond connection electrode 422 includes a plurality of second metalgrids 62 connected with each other.

FIG. 4B is a cross-sectional diagram of FIG. 4A taken along a sectionline B-B′, FIG. 5 shows the first touch electrode layer in FIG. 4A, andFIG. 6A shows the second touch electrode layer in FIG. 4A. Incombination with FIGS. 4A-4B, 5 and 6A, the touch structure 40 includesthe first metal grid layer 50 and the second metal grid layer 60, andthe insulation layer 70 is arranged between the first metal grid layer50 and the second metal grid layer 60. The first metal grid layer 50includes a plurality of first metal grids 52 defined by a plurality offirst metal lines 51, the second metal grid layer 60 includes aplurality of second metal grids 62 defined by a plurality of secondmetal lines 61, and planar shapes of each of the plurality of firstmetal grids 52 and each of the plurality of second metal grids 62 areboth polygons. For example, the planar shapes of each of the pluralityof first metal grids 52 and each of the second metal grids 62 shown inthe above figure are hexagons. Of course, in other embodiments, theirshapes may also be other polygons, such as quadrilateral, pentagon,triangle, etc., which can be specifically designed according to needs.The embodiments of the present disclosure do not limit the shape of eachfirst metal grid 52 and the shape of each second metal grid 62, as longas the corresponding features in claims are satisfied.

As shown in FIG. 4A and FIG. 6A, each of the plurality of secondconnection electrodes 422 includes a first metal grid row 1 and a secondmetal grid row 2 that are arranged along the second direction. The firstmetal grid row 1 includes a plurality of second metal grids 62 arrangedalong the first direction D1. The second metal grid row 2 is adjacent toand connected with the first metal grid row 1, and includes at least onesecond metal grid 62 arranged along the first direction D1. The numberof the second metal grids 62 in the second metal grid row 2 is less thanthe number of the least one second metal grid 62 in the first metal gridrow 1, and all the second metal lines 61 of the second metal grid 62 inthe second metal grid row 2 close to the first metal grid row 1 aresharing second metal lines 611 shared with the second metal grid 62 inthe first metal grid row 1.

In other embodiments, for example, as shown in FIG. 6C, the number ofthe least one second metal grid 62 in the second metal grid row 2 isequal to the number of the second metal grids 62 in the first metal gridrow 1, and all the second metal lines 61 of the second metal grid 62 inthe second metal grid row 2 close to the first metal grid row 1 aresharing second metal lines 611 shared with the second metal grid 62 inthe first metal grid row 1.

In the touch structure 40 provided by the embodiments of the presentdisclosure, because all the second metal lines 61 of the second metalgrid 62 in the second metal grid row 2 close to the first metal grid row1 are sharing second metal lines 611 shared with the second metal grid62 in the first metal grid row 1, except the second metal lines 61shared with the first metal grid row 1, there is no additional secondmetal line that overlaps with the first metal line 51 among the secondmetal lines, close to the first metal grid row 1, of the second metalgrid row 2, so that the overlapping area of the first metal line 51 andthe second metal line 61 is reduced, and the overlapping area of thefirst touch electrode 410 and the second touch electrode 420 is reduced,which reduces the mutual capacitance between the first touch electrode410 and the second touch electrode 420, improves the touch performance,and reduces the occurrence of false alarm and false touch and reducesthe power consumption of touch circuit; at the same time, although thereis an insulation layer between the first metal layer and the secondmetal layer, there is still the possibility that the insulation layer ismissing at some positions in the manufacturing process of the touchstructure. Therefore, reducing the overlapping area of the first metalline 51 and the second metal line 61 can also reduce the risk ofconnection between the first metal line 51 and the second metal line 62,and reduce the probability of short circuit between the first metal line51 and the second metal line 61, which is conducive to the stability ofthe touch function of the entire touch structure, and solves theproblems of poor touch performance, false alarm, false touch, andexcessive power consumption of the touch circuit caused by the largeoverlapping area of the first metal line 51 and the second metal line61; at the same time, it can solve the problem of short circuit causedby the missing of insulation layer during the manufacturing process ofthe touch structure.

For example, the first metal grid row 1 and the second touchsub-electrode 4211 adjacent to the first metal grid row 1 areelectrically connected, and the orthographic projection of the sharingsecond metal line 611 shared with the second metal grid 62 in the firstmetal grid row 1 on the first metal grid layer 50 overlaps with thefirst metal line 51, so that on the basis of minimizing the overlappingarea of the first metal line 51 and the second metal line 62, thedisplay panel or display device adopting the touch structure 40 has ahigh opening ratio.

For example, in this embodiment, the number of the second metal grids 62in the first metal grid row 1 is 2, and the number of the at least onesecond metal grid in the second metal grid row 2 is 1, so that thesecond connection electrode 422 includes as few second metal grid aspossible, and the overlapping area between the first metal line 51 andthe second metal line 62 is minimized, provided that the second grid row2 provides at least two electrical signal transmission channels alongthe second direction D2. The at least two electrical signal transmissionchannels are, for example, the first channel 621 and the second channel622 represented by the gray line in FIG. 6A.

In combination with FIG. 4A and FIG. 4B, the plurality of vias includesa first via 71, and the first metal grid row 1 is electrically connectedwith one second touch sub-electrode 4211 of the two second touchsub-electrodes 4211/4212 adjacent to the second connection electrode 422in which first metal grid row 1 is located through the first via 71.

For example, as shown in FIG. 4A and FIG. 4B, the orthographicprojections of the plurality of second metal lines 61 of the secondmetal grids 62 (for example, at least two metal grids 62) of the firstmetal grid row 1 on the first metal grid layer 50 respectively overlapwith the plurality of first metal lines 51 of the first metal grid 52 ofthe second touch sub-electrode 421, so that the second metal grid 62 hasa plurality of vertices overlapped with the first metal grid 52. Forexample, in this embodiment, the number of the plurality of vertices is5, which are respectively a first vertex 01, a second vertex 02, a thirdvertex 03, a fourth vertex 04 and a fifth vertex 05. The plurality ofvertices include a plurality of first connection vertices, the firstvias 71 are correspondingly arranged at the plurality of firstconnection vertices, that is, the plurality of vias 71 are arranged inone-to-one correspondence with the plurality of connection vertices, andthe vertex of the second metal grid 62 provided with the first via 71 iscalled the first connection vertex.

It should be noted that the first metal line and second metal line inthe present disclosure respectively refers to the metal line connectedbetween two adjacent vertices of the first metal grid and the metal lineconnected between two adjacent vertices of the second metal grid, thatis, each first metal line and each second metal line respectively serveas an edge of the first metal grid and an edge of the second metal grid.

For example, as shown in FIG. 4A, the planar shapes of each of theplurality of first metal grids 52 and each of the second metal grids 62are both hexagons. A plurality of second metal lines 61 a (for example,four second metal lines 61 a) of the second metal grid 62 of the firstmetal grid row 1 respectively overlap with four first metal lines 51A ofan edge first metal grid 52 (the first metal grid of the second touchsub-electrode 4211 close to the edge of the second connection electrode422) in the adjacent second touch sub-electrode 4211 in a directionperpendicular to the second metal grid layer 60, so that the edge firstmetal grid 52 has the above five vertices overlapped with the secondmetal grid 62; the four first metal lines 51 connect the five verticesin sequence to be in a W shape; each first metal line of the four firstmetal lines 51 intersect both the first direction D1 and the seconddirection D2, and at least one of the five vertices is the connectionvertex. For example, in this embodiment, the first vertex 01, the secondvertex 02, the fourth vertex 04 and the fifth vertex 05 are theconnection vertices; in other embodiments, the first vertex 01, thesecond vertex 02, the third vertex 03, the fourth vertex 04 and thefifth vertex 05 may all be the connection vertices; alternatively, insome embodiments, non-adjacent vertices are the connection vertices, forexample, the first vertex 01, the third vertex 03, and the fifth vertex05 are connection vertices.

For example, the plurality of second metal grids 62 in the first metalgrid row 1 are first edge second metal grids at a first edge of thesecond connection electrode, and are located at the first end of thesecond connection electrode 422 in the second direction D2, and areelectrically connected with the edge first metal grids of the adjacentsecond touch sub-electrodes 4211. That is, the edge second metal line 61a of the second metal grid 62 of the first metal grid row 1 is connectedwith the edge first metal line 51 a, closest to the first metal grid row1, of the second touch sub-electrode 4211 adjacent to the edge secondmetal line 61 a of the second metal grid 62 of the first metal grid row1. This arrangement can minimize the overlap between the second touchsub-electrode 4211 and the second connection electrode 422, therebyreducing the capacitive load on the touch sub-electrode and improvingthe touch sensitivity.

It should be noted that, in FIG. 4A, the first metal grid layer 50 iscloser to the viewer in a direction perpendicular to the base substrate21, so as to avoid the problem that more first metal grids being closeto pixel structures of the display structure affects the operation ofthe pixel structures. Therefore, the edge second metal line 61 a isshielded by the edge first metal line Ma, and the edge second metal line61 a and the edge first metal line 51 a can be distinguished incombination with FIG. 5 and FIG. 6A.

FIG. 4C is a schematic diagram of a vertex of the second metal gridwithout a via and a vertex of the second metal grid with a via, FIG. 4Dis a cross-sectional view of FIG. 4A taken along a section line D-D′,and specific details of the display structure are omitted in FIG. 4C andFIG. 4D.

For example, the left region of FIG. 4C shows an example of the vertex03 (corresponding to the vertex 53 of the first grid layer) of thesecond metal grid 62 without a via, and the right region shows anexample of the vertex 63 a (corresponding to the vertex 53 a of thefirst grid layer) of the second metal grid 62 with a via 71. As shown inFIG. 4C, in order to enable the second metal line 61 to form goodcontact with the first metal line 51 through the via 71 at theconnection vertex 01, a metal contact pad 65 with a large area at atleast one of the vertexes 01/02/04/05 is formed in the second metal gridlayer 60, resulting in the occupied area of the vertex being larger thanthe occupied area of the original vertex 03. Similarly, the first metalgrid layer 50 also forms a metal contact pad with a large area at thevertex 53 a. For example, the shape of the metal contact pad isrectangular or circular, and the size (average length of edges ordiameter) of the metal contact pad is more than twice that of the firstmetal line 51 or the second metal line 61. Therefore, the arrangement ofthe via 71 causes the overlapping area of the first metal line 51 andthe second metal line 62 to become larger.

Through the above arrangements, each connection vertex can generate aneffective electrical signal transmission channel, so as to minimize thearrangement of the metal contact pad and reduce the area of the metallayer. In this way, on the one hand, the self-capacitance of the secondconnection electrode 422 can be reduced, and on the other hand, theoverlapping area of the first metal line 51 and the second metal line 52can be reduced, so that at least from these two aspects, the capacitiveload of the touch sub-electrode can be reduced, and therefore the touchsensitivity can be improved.

The effective channel can be understood as a necessary first metal line51 that is directly connected to the vertex 53 a and enables the via 71corresponding to the vertex 53 a to transmit the touch signal on thesecond touch sub-electrode 421 to the second connection electrode 422.Therefore, the first metal line 51 connected between two adjacentvertices 53 a is not an effective channel, because the touch signal canbe transmitted to the second connection electrode 422 through the via 71corresponding to the vertex 53 a when the touch signal reaches anyvertex 53 a, without passing through the first metal line 51 that doesnot have to pass through.

For example, for each second connection electrode 422, the number of thevertex of the second metal grid of the first metal grid row 1 overlappedwith the edge first metal grid 52 a is not less than 5, and the numberof the connection vertex is not less than 3.

For example, the first metal line 51 directly connected to the vertex ofthe first metal line 51 corresponding to each connection vertex iscomplete, that is, the above first metal line 51 connected between thetwo vertices of the first metal grid 52 does not have a space or anopening in the middle. For example, the first metal grid 52 where thevertex of the first metal line 51 corresponding to each connectionvertex is located is complete, that is, all the first metal lines 51 inthe first metal grid 52 are complete, that is, all the first metal lines51 in the first metal grid 52 does not have a space or an opening. Thisarrangement can improve the transmission efficiency and effectiveness ofthe touch signal input from the second touch sub-electrode 421 to thesecond connection electrode 422.

For example, as shown in FIG. 4D, the average line width X1 of the firstmetal line 51 is larger than the average line width X2 of the secondmetal line 61. For example, in the width direction of the metal line,the orthographic projection of the second metal line 61 on the basesubstrate 21 is located within the orthographic projection of the firstmetal line 51 on the base substrate 21, which can effectively improvethe opening ratio of the display substrate.

For example, as shown in FIG. 4A, FIG. 5 and FIG. 6A, each of theplurality of second connection electrodes 422 further includes a thirdmetal grid row 3 and a fourth metal grid row 4 that are arranged in thesecond direction D2. The third metal grid row 3 is located on the sideof the second metal grid row 4 away from the first metal grid row 1, andincludes a plurality of second metal grids 62 arranged along the firstdirection D1; the fourth metal grid row 4 is located on the side of thethird metal grid row 3 close to the second metal grid row 2 and adjacentto and connected with the third metal grid row 3, the fourth metal gridrow 4 includes at least one second metal grid 62 arranged along thefirst direction D1. The number of the second metal grid 62 in the fourthmetal grid row 4 is less than the number of the second metal grid in thethird metal grid row 3, and all the second metal lines 612 of the secondmetal grid 62 in the fourth metal grid row 4 close to the third metalgrid row 3 are sharing second metal lines 612 shared with the secondmetal grid 62 in the third metal grid row 3.

For example, in some other embodiments, for example, as shown in FIG.6C, the number of the second metal grid 62 in the fourth metal grid row4 is equal to the number of the second metal grid in the third metalgrid row 3, and all the second metal lines 612 of the second metal grid62 in the fourth metal grid row 4 close to the third metal grid row 3are sharing second metal lines 612 shared with the second metal grid 62in the third metal grid row 3. The pattern of the first metal grid isdesigned corresponding to the second metal grid shown in FIG. 6C, aslong as the same conditions in the previous embodiment are met.

In the touch structure 40 provided by the embodiments of the presentdisclosure, because all the second metal lines 61 of the second metalgrid 62 in the fourth metal grid row 4 close to the third metal grid row3 are sharing second metal lines 612 shared with the second metal grid62 in the third metal grid row 3, in addition to the sharing secondmetal lines 61 shared with the third metal grid row 3, there is noadditional second metal line overlapping with the first metal line 51 inthe second metal lines of the fourth metal grid row 4 close to the firstmetal grid row 1. Therefore, the overlapping area of the first metalline 51 and the second metal line 61 is reduced, and the overlappingarea of the first touch electrode 410 and the second touch electrode 420is reduced, so as to further achieve the technical effect of reducingthe mutual capacitance value between the first touch electrode 410 andthe second touch electrode 420, reducing the power consumption of thetouch circuit and reducing the probability of short circuit between thefirst metal line 51 and the second metal line 61.

For example, the second metal grid 62 of the third metal grid row 3 is asecond edge second metal grid of the second connection electrode 422 ata second edge of the second connection electrode 422, which is locatedat the second end of the second connection electrode 422 in the seconddirection and is electrically connected with the edge first metal gridof the second touch sub-electrode 4212 adjacent to the third metal gridrow 3, and the second end is opposite to the first end in the seconddirection D2. That is, the edge second metal line 61 b of the secondmetal grid 62 of the third metal grid row 3 is connected with the edgefirst metal line 51 b, closest to the third metal grid row 3, of thesecond touch sub-electrode 4212 adjacent to the third metal grid row 3.This arrangement can minimize the overlapping area between the secondtouch sub-electrode 4212 and the second connection electrode 422,thereby reducing the capacitive load on the touch sub-electrode andimproving the touch sensitivity.

For example, as shown in FIG. 4A, the plurality of vias further includea second via 72, and the third metal grid row 3 is electricallyconnected with the other electrode 4212 of the two second touchsub-electrodes adjacent to the second connection electrode 422 where thethird metal grid row 3 is located through the second via.

For example, as shown in FIG. 4A, the orthographic projections of theplurality of second metal lines 61 of the second metal grid 62 of thethird metal grid row 3 on the first metal grid layer 50 respectivelyoverlap with the plurality of first metal lines 51 of the first metalgrid 52 of the second touch sub-electrode 421, so that the second metalgrid 62 has a plurality of vertices overlapped with the first metal grid52. For example, in this embodiment, the number of the plurality ofvertices in the third metal grid row 3 is 5, which are respectively asixth vertex 01′, a seventh vertex 02′, an eighth vertex 03′, a ninthvertex 04′ and a tenth vertex 05′. The plurality of vertices include aplurality of second connection vertices, the second vias 72 arecorrespondingly arranged at the plurality of connection vertices, thatis, the plurality of second vias 72 and the plurality of secondconnection vertices are arranged in one-to-one correspondence. Thevertices of the second metal grid 62 provided with the second vias 72are called the second connection vertices.

The setting mode of the second via 72 is similar to the setting mode ofthe first via 71, please refer to the descriptions of the relevantfeatures of the first via 71.

Combined with FIG. 4A and FIG. 5 , for example, the orthographicprojection of the sharing second metal line 612 shared with the secondmetal grid 62 in the third metal grid row 3 on the first metal gridlayer 50 does not overlap with the first metal line 51, that is, thefirst metal line 51 is not provided at the position of the first metallayer 50 corresponding to the sharing second metal line 612, so as tominimize the overlapping area of the first metal line 51 and the secondmetal line 62 and avoid the problem caused by the large overlapping areaof the two.

Of course, in other embodiments, the orthographic projection of thesharing second metal line 612 on the first metal grid layer 50 may alsooverlap with the first metal line 51, so that the display panel ordisplay device using the touch structure 40 has a high opening ratio onthe basis of minimizing the overlapping area of the first metal line 51and the second metal line 62.

The number of the second metal grid in the third metal grid row is 2,and the number of the second metal grid in the fourth metal grid row is1, so as to minimize the overlapping area between the first metal line51 and the second metal line 62 on the basis of ensuring that the signalcan be transmitted through the second connection electrode 422. In thiscase, each second electrode 422 includes at least two electrical signaltransmission channels along the second direction D2.

For example, the second connection electrode 422 further includes atleast one intermediate metal grid row located between the second metalgrid row 2 and the fourth metal grid row 4, and each row of the at leastone intermediate metal grid row includes at least one second metal grid62. For example, in this embodiment, the number of the at least oneintermediate metal grid row is 1, that is, the fifth grid row 5. Thefifth grid row 5 is adjacent to and connected with both the second metalgrid row 2 and the fourth metal grid row 4.

For example, the number of the second metal grid in each row of the atleast one intermediate metal grid row is 1. For example, the fifth gridrow 5 has only one second metal grid, so that the second connectionelectrode 422 includes as few second metal grids as possible, whileensuring that the fifth grid row 5 provides the at least two electricalsignal transmission channels along the second direction D2, andtherefore the overlapping area between the first metal line 51 and thesecond metal line 62 is minimized.

For example, the pattern of each of the plurality of second connectionelectrodes 422 is symmetrical with respect to the symmetry axis alongthe first direction D1, so as to facilitate the uniformity of touchsignal transmission conducted through the second connection electrode422.

For example, each second metal grid 62 includes at least two verticaledges 61 c along the second direction D2, so as to ensure that each rowof the second metal grid can provide at least two electrical signaltransmission channels along the second direction D2. In this way, when acertain vertical edge 61 c has the risk of disconnection, the occurrenceof bad touch points can be prevented, thereby ensuring the reliabilityof the touch function. For example, the orthographic projections of theat least two vertical edges 61 c on the first metal grid layer 50 do notoverlap with the first metal line 51, so as to minimize the overlappingamount between the first metal line 51 and the second metal line 62.

For example, as shown in FIG. 4A and FIG. 6A, the adjacent second touchsub-electrodes 4211 and 4212 are electrically connected through twosecond connection electrodes 422, that is, a second connection electrode422 on the left and a second connection electrode 422 on the right inFIG. 6A. The two second connection electrodes 422 are spaced apart fromeach other. In combination with FIG. 4A and FIG. 5 , the orthographicprojection of each of the plurality of first connection electrodes 412on the second metal grid layer 60 is located in the gap between twosecond connection electrodes 422 connecting the adjacent two secondtouch sub-electrodes 4211 and 4212.

In combination with FIG. 4A and FIG. 5 , for example, each of theplurality of first touch sub-electrodes 421 is electrically connectedwith the adjacent first connection electrode 412 through at least onefirst connection line 464 constituted by a plurality of first metallines 51 that are connected head to tail in sequence. The orthographicprojection of the first connection line 461 on the second metal gridlayer 60 overlaps with a plurality of second metal lines of the secondconnection electrode 422 respectively, and at least partially overlapswith the orthographic projection of the sharing second metal line 611 onthe first metal grid layer 50. For example, in the embodiments shown inFIG. 4A, FIG. 5 and FIG. 6A, the first touch sub-electrode 411 on theleft in the FIG. 5 is electrically connected with the first connectionelectrode 412 through three first connection lines 4611, 4612 and 4613,and a part of the orthographic projection of the first connection line4611 on the second metal grid layer 60 overlaps with the sharing secondmetal line 611 shared by the first metal grid row 1 and the second metalgrid row 2 of the second connection electrode 422 on the left in theFIG. 4A, so as to reduce the overlapping area of the first metal line 51and the second metal line 62 as much as possible and avoid the problemcaused by the large overlapping area of the two. The first touchsub-electrode 411 on the right in the FIG. 5 is electrically connectedwith the first connection electrode 412 through a plurality of secondconnection lines 462. Each second connection line is constituted by aplurality of first metal line 51 connected from head to tail insequence, similar to each first connection line. For example, the firsttouch sub-electrode 411 on the right in the FIG. 5 is electricallyconnected with the first connection electrode 412 through three secondconnection lines 4621, 4622 and 4623, and a part of the orthographicprojection of the second connection line 4621 on the second metal gridlayer 60 overlaps with the sharing second metal line 611 shared by thefirst metal grid row 1 and the second metal grid row 2 of the secondconnection electrode 422 on the right in the FIG. 4A, so as to reducethe overlapping area of the first metal line 51 and the second metalline 62 as much as possible, and avoid the problem caused by the largeoverlapping area of the two.

For example, in the embodiment, at the position of the first metal layer50 corresponding to the sharing second metal line 612 of the third metalgrid row 3 of the second connection electrode 422, there is no firstconnection line and the second connection line 612 that overlap with thesharing second metal line 612, so as to minimize the overlapping amountbetween the first metal line 51 and the second metal line 62. Of course,in other embodiments, the first connection line and the secondconnection line may at least partially overlap with the orthographicprojection of the sharing second metal line 612 on the first metal layer50.

For example, as shown in FIG. 6A, a, b, c, d, e, and f respectivelyrepresent a plurality of edges of different second metal grids 62. Forexample, the length relationship of these edges is: a<e<c, f<d<b. Forexample, the second grid lines of the second metal grid layer 402 inFIG. 6A that overlap with the first metal line are respectively the gridlines a, b, c, d, e, f marked in the FIG. 6A. In the case that thenumber of second metal lines 61 overlapping with the first metal line 51is equal, the sum of the lengths of these second grid lines overlappingwith the first metal line in the embodiment of the present disclosure isthe smallest. According to the length of each edge of the second metalgrid 62 and each edge of the first metal grid 52, the position of thesecond metal grid 62 is designed in a way that the overlapping length isthe smallest, so that the sum of the length of the second grid lineoverlapping with the first metal line is the smallest on the basis ofsatisfying the conditions described above. Of course, in otherembodiments, the position of the second grid line overlapping with thefirst metal line may be different from that in FIG. 4A, but the sum ofthe length of the second grid line overlapping with the first metal linemay still be minimized by design.

For example, the plurality of first metal lines located in the boundaryregion between the adjacent first touch sub-electrode and the secondtouch sub-electrode respectively include a plurality of openings. Eachof the plurality of openings divides the first metal line into two firstmetal segments. One of the two first metal segments belongs to the firsttouch sub-electrode and the other belongs to the second touchsub-electrode, so that the adjacent first touch sub-electrode and thesecond touch sub-electrode are insulated.

For example, FIG. 7A and FIG. 7B respectively show two examples of theenlarged schematic diagram of a region B in FIG. 2 . The region Binvolves two first touch sub-electrodes 411 adjacent and insulated inthe second direction D2 and two second touch sub-electrodes 421 adjacentand insulated in the first direction D1. The region B is the isolationregion of the four touch sub-electrodes.

The metal grids shown in FIG. 7A are all located in the first metal gridlayer, that is, they are all the first metal grids, in which the lightgrid represents the first metal grid in the two adjacent first touchsub-electrodes 411, and the dark grid represents the first metal grid inthe two adjacent second touch sub-electrodes 421.

As shown in FIG. 7A, the first touch sub-electrode 411 and the secondtouch sub-electrode 421 are adjacent to each other. The plurality offirst metal lines 51 located in the boundary region between the twoinclude a plurality of openings 510. For example, each space 510 islocated in the middle of the first metal line 51, that is, each space510 is located in the middle of one edge of the first metal grid 52, andseparates the first metal line 51 into two first metal line segments 51f, one of the two first metal segments 51 f belongs to the first touchsub-electrode 411 and the other belongs to the second touchsub-electrode 421, so that the adjacent first touch sub-electrode 411and the second touch sub-electrode 421 are insulated.

It should be noted that, in the embodiments of the present disclosure,the first metal segment belonging to the touch sub-electrode means thatthere is an electrical connection between the first metal segment andthe touch sub-electrode.

In the touch structure provided by at least one embodiment of thepresent disclosure, the adjacent and insulated touch sub-electrodes (forexample, between the adjacent first touch sub-electrode and the secondtouch sub-electrode, between the two adjacent second touchsub-electrodes in the first direction, and between the two adjacentfirst touch sub-electrodes in the second direction) are insulated fromeach other through the space formed by the disconnected metal line;compared with realizing insulation by setting dummy electrodes, thisarrangement can maximize the arrangement area of the touch electrode,improve the density of the touch electrode, and thus improve the touchsensitivity.

For example, as shown in FIG. 7A, the edge metal grid of each touchsub-electrode is incomplete, that is, the edge metal grid of each touchsub-electrode includes a part of the first metal grid, and the edgemetal grids in adjacent touch sub-electrodes match each other to definethe first metal grid.

For example, at least one first metal grid includes three first metalgrid parts insulated from each other, the three first metal grid partsrespectively belong to one first touch sub-electrode and two adjacentsecond touch sub-electrodes in the first direction D1. For example, theshape of the first metal grid is hexagonal, and at least two first metalgrids include the above-mentioned three first metal grid parts that areinsulated from each other.

As shown in FIG. 7A and FIG. 7B, in FIG. 7A and FIG. 7B, each of the twofirst metal grids 52 c in the dotted circle includes three first metalgrid parts insulated from each other, the three first metal grid partsrespectively belong to three touch sub-electrodes insulated from eachother, the three touch sub-electrodes include two adjacent first touchsub-electrodes 411 adjacent to each other in the second direction D2 anda second touch sub-electrode 421 (as shown in FIG. 7A) located betweenthe two adjacent first touch sub-electrodes, or the three touchsub-electrodes include two adjacent second touch sub-electrodes 421adjacent to each other in the first direction D1 and a first touchsub-electrode 411 located between the two adjacent second touchsub-electrodes 421 (as shown in FIG. 7B). This design makes thearrangement of touch sub-electrodes more compact while being effectivelyinsulated, thus improving the touch sensitivity.

For example, as shown in FIG. 7A and FIG. 7B, there is an opening 510 oneach edge of three edges of each metal grid 52 c, so that the metal gridis divided into three parts that are insulated from each other.

For example, as shown in FIG. 7A and FIG. 7B, the shape of the firstmetal grid 52 c is a polygon, such as a hexagon, the hexagon includestwo edges parallel to the second direction D2 and opposite to eachother. The first metal line 51 on at least one edge of the first metalgrid 52 c has an opening which separates the first metal line into twofirst metal line segments 51 f. For example, as shown in FIG. 7A, thetwo first metal segments 51 f respectively belong to two first touchsub-electrodes 411 adjacent to each other in the second direction D2.For another example, as shown in FIG. 7B, the two first metal segments51 f respectively belong to the adjacent first touch sub-electrode 411and the second touch sub-electrode 421.

For example, as shown in FIG. 7A and FIG. 7B, the polygons of two firstmetal grides 52 c share one edge, that is, the two first metal grids 52c share one first metal line 51 g, and there is an opening 520 on thefirst metal line 51 g, the opening 520 separates the first metal line 51g into two first metal segments that are spaced apart from each other.

For example, as shown in FIG. 7A, the two first metal grids 52 c arearranged along the first direction D1, and the first metal line 51 gshared by the two first metal grids 52 c is parallel to the seconddirection D2. The two first metal segments of the shared first metalline 51 g respectively belong to two first touch sub-electrodes 411adjacent to each other in the second direction D2; that is, the twoadjacent first touch sub-electrodes 411 in the second direction D2 aredirectly adjacent and separated from each other through the opening. Forexample, the two adjacent second touch sub-electrodes 421 adjacent toeach other in the first direction D1 are separated from each other by apart of the two adjacent first touch sub-electrodes 411 adjacent to eachother in the second direction D2.

For example, as shown in FIG. 7B, the arrangement direction of the twofirst metal grids 52 c is neither parallel nor perpendicular to thesecond direction D2, and the first metal line 51 g shared by the twofirst metal grids is neither parallel nor perpendicular to the seconddirection D2. The two first metal segments in the first metal line 51 gshared by the two first metal grids respectively belong to two adjacentsecond touch sub-electrodes 421 adjacent to each other in the firstdirection D1; that is, the two adjacent second touch sub-electrodes 421adjacent to each other in the first direction D1 are directly adjacentand are separated from each other through the opening. For example, thetwo adjacent first touch sub-electrodes 411 adjacent to each other inthe second direction D2 are separated from each other by a part of thetwo adjacent second touch sub-electrodes 421 adjacent to each other inthe first direction D1.

For example, as shown in FIG. 7A and FIG. 7B, each of the three firstmetal line parts of one of the two first metal grids 52 c includes acomplete first metal line 51 which has no opening; and the number of thefirst metal lines included in the three first metal grid parts of theother one of the two first metal grids 52 c is different from eachother, for example, the number is 0, 1, and 2, respectively.

As shown in FIG. 7A and FIG. 7B, each first metal grid part includes twofirst metal segments 51 f, or includes only two first metal segments 51f, or includes a complete first metal line 51 and two first metalsegments 51 f, and the first metal line 51 is connected between the twofirst metal segments, or may include two complete first metal lines 51and two first metal segments 51 f, the two first metal lines 51 areconnected between the two first metal segments 51 f.

In addition, in one first touch sub-electrode, one first metal grid isnot necessarily in a complete closed shape. For example, as shown inFIG. 5 , in at least one first touch sub-electrode 411, one edge of apart of the first metal grids 52 b has an opening 530. Alternatively, asshown in FIG. 7C, in at least one first touch sub-electrode 411, oneedge of a part of the first metal grids 52C is missing.

Similarly, in one second touch sub-electrode, one second metal grid isnot necessarily in a complete closed shape. For example, as shown inFIG. 7D, in one second touch sub-electrode 421, one edge of a part ofthe second metal grids 62 has an opening 620. Alternatively, in someembodiments, one edge of a part of the second metal grids 62 is missing.As long as the function of the second touch sub-electrode is notaffected, and in some embodiments, the second grid row 2 is guaranteedto provide at least two electrical signal transmission channels alongthe second direction D2, for example, the at least two electrical signaltransmission channels are respectively a first channel 621 and a secondchannel 622 represented by the gray lines in FIG. 7D. Of course, the atleast two electrical signal transmission channels are not unique, andare not limited to the case shown in FIG. 7D.

FIG. 6B is a schematic diagram of another second touch electrode layerprovided by an embodiment of the present disclosure. The secondconnection electrode shown in FIG. 6B has the following differences fromthose in FIG. 4A and FIG. 6A. Each of the plurality of second connectionelectrodes further includes a third metal grid row 3 arranged in thesecond direction with the first metal grid row, the third metal grid row33 is located on the side of the second metal grid row 2 away from thefirst metal grid row 1 and adjacent to the second metal grid row 2, andincludes a plurality of second metal grids 62 arranged along the firstdirection D1; the number of the second metal grid 62 in the second metalgrid row 2 is less than the number of the second metal grid 62 in thethird metal grid row 3, and all the second metal lines 612 of the secondmetal grid 62 in the second metal grid row 2 close to the third metalgrid row 3 are sharing second metal lines 612 shared with the secondmetal grid 62 in the third metal grid row 3; the second metal grid 62 ofthe third metal grid row 3 is the second edge second metal grid of thesecond connection electrode 422 at a second edge of the secondconnection electrode 422, which is located at the second end of thesecond connection electrode 422 in the second direction D2, and iselectrically connected with the edge first metal grid of the secondtouch sub-electrode 412 adjacent to the third metal grid row 3, and thesecond end is opposite to the first end in the second direction D2; theplurality of vias include a second via, and the third metal grid row 3is electrically connected with the other one of the two second touchsub-electrodes 421 adjacent to the second connection electrode 422through the second via. Other features of the second connectionelectrode shown in FIG. 6B, such as the features and correspondingtechnical effects of the first metal grid row and the second metal gridrow, are the same as those in the embodiments shown in FIG. 4A and FIG.6A, and the previous descriptions can be referred to. In the case thatthe second metal grid layer 60 adopts the second connection electrodeshown in FIG. 6B, the pattern of the first metal grid layer 50 may bechanged accordingly.

At least one embodiment of the present disclosure provides a touchstructure, the touch structure includes a plurality of touchsub-electrodes spaced apart from each other, and a dummy electrode. Thedummy electrode is embedded in at least one touch sub-electrode of theplurality of touch sub-electrodes and spaced apart from the touchsub-electrode in which the dummy electrode is embedded to insulate eachother; the at least one touch sub-electrode comprises a strip-shapedchannel and a main body part surrounding the dummy electrode and thechannel, and the strip-shaped channel passes through the dummyelectrode, and both two ends of the strip-shaped channel in an extensiondirection of the strip-shaped channel are connected with the main bodypart.

In at least one embodiment of the present disclosure, for example, incombination with FIG. 2 and FIG. 8A, the touch structure 40 includes adummy electrode 430. The dummy electrode 430 is embedded in at least onetouch sub-electrode of the plurality of touch sub-electrodes and isspaced apart from the touch sub-electrode where the dummy electrode 430is located to insulate each other. The plurality of touch sub-electrodesare spaced apart from each other. For example, each touch sub-electrodeis embedded with a dummy electrode 430, or some of the plurality oftouch sub-electrodes are respectively embedded with a dummy electrode430. In FIG. 2 , for example, the at least one touch sub-electrode isthe second touch sub-electrode 421. In other embodiments, for example,as shown in FIG. 8A, the at least one touch sub-electrode may be thefirst touch sub-electrode 411.

By providing the dummy electrode 430 spaced apart from the touchsub-electrode without electrical connection, the electrode area(effective area) of the touch electrode is reduced, and the capacitiveload (self-capacitance) on the touch electrode is reduced, so that theload on the touch electrode is reduced and the touch sensitivity isimproved. For example, the dummy electrode 430 is in a floating state,that is, it is not electrically connected to other structures or doesnot receive any electrical signals. However, in the dummy electrode 430shown in FIG. 2 , there is no metal line of the touch sub-electrode, sothe touch signal amount in the region provided with the dummy electrode430 is small, which leads to the decline of the touch accuracy of theregion and affects the touch performance of the electronic deviceadopting the touch structure, such as the display panel.

For example, in the touch structure provided by at least one embodimentof the present disclosure, as shown in FIG. 8A, taking one first touchsub-electrode 411 as an example, the first touch sub-electrode includesa strip-shaped channel 281 and a main body part 280 surrounding thedummy electrode 430 and the channel 281. The strip-shaped channel 281passes through the dummy electrode, and both two ends 281 a/281 b in theextension direction of the strip-shaped channel 281 are connected withthe main body part 280, the dummy electrode 430 includes a first part431 and a second part 432 that are spaced apart by the strip-shapedchannel 281. The first part 431 and the second part 432 are both spacedapart from the first touch sub-electrode 411 to be insulated from thefirst touch sub-electrode 411. In FIG. 8A, the white region surroundingthe first part 431 and the second part 432 of the dummy electrode 430represents the space between the first part 431 and the first touchsub-electrode 411, and the space between the second part 432 and thefirst touch sub-electrode 411. In the touch structure, because thechannel 281 passes through the dummy electrode 430, the touch blind spotcaused by the continuous arrangement of the dummy electrode can beavoided; at the same time, the channel 281 passing through the dummyelectrode 430 forms an effective signal channel inside the dummyelectrode to reduce the resistance of the touch electrode; moreover, thechannel 281 passing through the dummy electrode 430 increases the touchsignal amount of the region provided with the dummy electrode 430, andtherefore the touch accuracy of the region is improved, and thus thetouch performance of the electronic device using the touch structure,such as the display panel, is improved.

As shown in FIG. 8A, for example, the shape of the outer contour of thewhole structure 28 constituted by the dummy electrode 430 and thestrip-shaped channel 281 (that is, the plane shape of the wholestructure 28 constituted by the dummy electrode 430 and the strip-shapedchannel 281) is a first polygon; for example, the first polygon is aregular polygon, such as a rectangle, a square, a parallelogram, aregular hexagon, and so on. Of course, the shape of the first polygon isnot limited to the types listed above. The shape of the whole structure28 constituted by the dummy electrode 430 and the strip-shaped channel281 being polygon means that the jag of edges of the polygon areignored, and the edges are allowed to be jagged, each edge of the firstpolygon is not required to be a strict straight line segment. Forexample, in some other embodiments, the shape of the outer contour ofthe whole structure 28 constituted by the dummy electrode 430 and thestrip-shaped channel 281 may be other shapes such as a circle, which isnot limited by the embodiments of the present disclosure.

For example, in some embodiments, as shown in FIG. 8A, the two ends 281a/281 b of the channel 281 are respectively close to the two adjacentedges of the first polygon.

Alternatively, in some embodiments, as shown in FIG. 8B, the two ends281 a/281 b of the channel 281 are respectively close to the twoopposite edges of the first polygon. In this way, the channel 281 passesthrough the dummy electrode 430 more comprehensively, achieving a bettertechnical effect of improving the touch accuracy of the region providedwith the dummy electrode 430. Other features of the first touchsub-electrode shown in FIG. 8B that are not mentioned are the same asthose in FIG. 8A, please refer to the descriptions of FIG. 8A.

Alternatively, in some embodiments, as shown in FIG. 8C, two ends 281a/281 b of the channel 281 are respectively close to two non-adjacentvertices of the first polygon. Other features of the first touchsub-electrode shown in FIG. 8C that are not mentioned are the same asthose in FIG. 8A, please refer to the descriptions of FIG. 8A.

For example, as shown in FIG. 8A, the shape of the outer contour of themain body part 280 is a second polygon, and the second polygon and thefirst polygon are similar polygons. That is, the number of edges of thesecond polygon and the first polygon are the same, and the correspondingangles are basically the same, and the corresponding edges are basicallyproportional. In this way, the shape of the whole structure 28constituted by the dummy electrode 430 and all the channels can beconsistent with the shape of the outer contour of the main body part280, so that the touch performance of the entire touch structure hasbetter uniformity, and it is convenient for patterning and reduces themask manufacturing cost.

For example, as shown in FIG. 8A, the shape of the outer contour of thewhole structure 28 constituted by the dummy electrode 430 and allchannels is the first polygon, such as a rectangle, and the channel 281is parallel to two edges of the first polygon, that is, the rectangle.

For example, the strip-shaped channel 281 is in a straight strip shapeas a whole, for example, it is in a strip shape extending along astraight line as a whole. In the extension direction of the straightstrip, the width of the straight strip may be consistent, for example,as shown in FIG. 8I, it may be partially consistent, for example, asshown in FIG. 8G. In other embodiments, at least part of thestrip-shaped channel is a curved strip-shaped channel, for example, theentire channel is a curved strip-shaped channel, or at least one channelis a curved strip-shaped channel in the following case that there are aplurality of channels. Alternatively, in some embodiments, at least someof the strip-shaped channels are in a fold-line shape, for example, theentire channel is in a fold-line shape, or in the following case thatthere are a plurality of channels, at least one channel is in afold-line shape.

In some embodiments, for example, as shown in FIG. 8D, one first touchsub-electrode 411 includes a plurality of strip-shaped channels, and theplurality of strip-shaped channels includes a strip-shaped first channel281 and a strip-shaped second channel 282. The strip-shaped firstchannel 281 extends substantially along the first extension direction(for example, the third direction D3); the strip-shaped second channel282 extends substantially along the second extension direction (forexample, the fourth direction D4) and intersects with the first channel281. That is, both the extension direction of the first channel 281 andthe extension direction of the second channel 282 intersect with thearrangement direction of the first touch sub-electrode 411 and thearrangement direction of the second touch sub-electrode 421. The dummyelectrode 430 includes four parts spaced apart from each other by thefirst channel 281 and the second channel 282, which are a first part281, a second part 282, a third part 283 and a fourth part 284,respectively. It should be noted that different parts of a channel maynot be located on one straight line, and the whole channel may not be astraight line with uniform width. Compared with the case that one firsttouch sub-electrode 411 includes one strip-shaped channel, the case thatone first touch sub-electrode 411 includes the first channel 281 and thesecond channel 282 that intersect each other can further increase theamount of touch signals of the region provided with the dummy electrode430 in multiple directions, improve the touch accuracy of the region,and thus improve the touch performance of the electronic device adoptingthe touch structure, such as the display panel.

For example, the first channel 281 and the second channel 282 thatintersect each other are in a shape of a Chinese character “+”, and boththe first extension direction and the second extension directionrespectively has an included angle of 45 degrees with both the firstdirection D1 (the arrangement direction of the first touch sub-electrode411) and the second direction D2 (the arrangement direction of thesecond touch sub-electrode 421), so that the region provided with thedummy electrode 430 has a relatively uniform touch accuracy. Forexample, the two ends 281 a/281 b of the first channel 281 arerespectively close to two opposite edges of the first polygon(rectangle), and the two ends 282 a/282 b of the second channel 282 arerespectively close to the other two opposite edges of the first polygon(rectangle); the sizes and shapes of the first part 281, the second part282, the third part 283 and the fourth part 284 are the same as eachother, so as to further make the region provided with the dummyelectrode 430 have more uniform touch accuracy. Other features of thefirst touch sub-electrode shown in FIG. 8D that are not mentioned arethe same as those in FIG. 8A, please refer to the descriptions of FIG.8A.

For example, in FIG. 8D, the shapes of the first part 281, the secondpart 282, the third part 283, and the fourth part 284 are allrectangles, such as squares. For example, as shown in FIG. 8E, the shapeof the overall outer contour of the whole structure constituted by thedummy electrode 430 and the strip-shaped channel is irregular; all theshapes of the first part 281, the second part 282, the third part 283and the fourth part 284 include at least two strip-shaped partsrespectively extending in different directions, for example, all theshapes of the at least two strip-shaped parts are irregular.

For example, in other embodiments, at least one first touchsub-electrode 411 includes a plurality of strip-shaped channels, and theplurality of strip-shaped channels include: a plurality of strip-shapedfirst channels and a plurality of strip-shaped second channels, and theplurality of strip-shaped first channels extend substantially along thefirst extension direction and are spaced apart from each other; theplurality of strip-shaped second channels extend substantially along thesecond extension direction and are spaced apart from each other, andeach of the plurality of strip-shaped second channels intersects each ofthe plurality of strip-shaped first channels. The dummy electrodeincludes a plurality of parts separated from each other by the pluralityof strip-shaped first channels and the plurality of strip-shaped secondchannels.

Exemplarily, as shown in FIG. 8F, for example, at least one first touchsub-electrode 411 includes two strip-shaped first channels 281 and twostrip-shaped second channels 282, that is, the plurality of strip-shapedfirst channels includes two first channels 281, and the plurality ofstrip-shaped second channels include two second channels 282. The dummyelectrode 430 includes at least nine parts separated from each other bytwo first channels 281 and two second channels 282, and the at leastnine parts are a first part 431, a second part 432, a third part 433, afourth part 434, a fifth part 435, a sixth part 436, a seventh part 437,an eighth part 438 and a ninth part 439, respectively.

For example, as shown in FIG. 8F, the ratio l/L1 of the maximum size ofthe region crossed by the entire dummy electrode 430 (including, forexample, the first part to the ninth part in this embodiment) to themaximum size of the first touch sub-electrode 411 where the dummyelectrode is located in the same direction is greater than or equal to0.4 and less than or equal to 0.6. The test shows that if the value ofl/L1 is too large, too much space is occupied and the effective toucharea is reduced; and if the value of l/L1 is too small, the load on thetouch electrode cannot be effectively reduced and the touch sensitivitycannot be effectively improved, and in the case that the value of l/L1is greater than or equal to 0.4 and less than or equal to 0.6, the besteffect of improving the touch accuracy and reducing the load on thetouch electrode can be achieved. For example, the outer contour of themain body part 280 of the first touch sub-electrode 411 is rectangular.The outer contour of the main body part 280 includes a first edge 291 aand a second edge 291 b that intersect each other. The first edge 291 aand the second edge 291 b respectively extend along the third directionD3 and the fourth direction D4. The third direction D3 and the fourthdirection D4 are different, for example, they are orthogonal. Forexample, the third direction D3 is different from the first direction D1or the second direction D2; and the fourth direction D4 is differentfrom the first direction D1 or the second direction D2.

For example, the third direction D3 has an angle of 45 degrees with boththe first direction D1 and the second direction D2, and the fourthdirection D4 has an angle of 45 degrees with both the first direction D1and the second direction D2.

For example, the same direction in the above description “maximum size .. . in the same direction” is the third direction D3, or the samedirection may also be the fourth direction D4. For example, the maximumsize 1 in the third direction D3 of the region crossed by the entiredummy electrode 430 and the maximum size L1 in the third direction D3 ofthe first touch sub-electrode 411 where the dummy electrode is locatedare respectively equal to the maximum size in the fourth direction D4 ofthe region crossed by the entire dummy electrode 430 and the maximumsize L2 in the fourth direction D4 of the first touch sub-electrode 411where the dummy electrode is located. In this case, for example, theshape of the outer contour of the main body part 280 is square, so as toobtain uniform touch accuracy in the third direction D3 and the fourthdirection D4, thereby improving the touch accuracy uniformity of theentire touch structure.

For example, the ratio of the minimum width d of each channel (forexample, each first channel 281) to the maximum size 1 of the regioncrossed by the entire dummy electrode 430 (for example, including thefirst part to the ninth part in this embodiment) is greater than orequal to 0.03 and less than or equal to 0.1. For example, the width ofeach second channel 282 is substantially uniform, and the minimum widthof the second channel 282 is substantially a fixed value. For anotherexample, in other embodiments, for at least one second channel 282, thewidth of the second channel 282 is inconsistent along the extensiondirection of the second channel 282, and the minimum width of one secondchannel 282 is the minimum of its multiple different widths.

It should be noted that the direction of the width or the widthdirection of the channel at a certain position is perpendicular to theextension direction of the channel at this position.

For example, in some embodiments, l=1411 μm, d=78 μm, L1=L2=3308 μm. Ofcourse, the embodiments of the present disclosure do not limit thespecific values of the above sizes, which can be designed according tospecific needs.

For example, for each touch sub-electrode, the effective area accountsfor 52%-64% of the total area of the touch sub-electrode, that is, thearea of the dummy electrode 430 accounts for 36%-48% of the total areaof the touch sub-electrode. If the proportion of the area of the dummyelectrode 430 is too large, the resistance of the touch electrode wouldbe increased. If the proportion of the area of the dummy electrode 430is too small, the touch performance of the touch structure in the weakgrounding state would not be effectively improved.

For example, as shown in FIGS. 8A-8F, one first touch sub-electrode 411further includes a plurality of interdigital structures 440 connected tothe main body part 280, and the plurality of interdigital structures 440are distributed around the main body part 280 and each interdigitalstructure protrudes from the main body part 280 in a direction away fromthe main body part 280. As shown in FIG. 8F, the extension direction ofeach channel is parallel to the extension direction of a part of theinterdigital structures 440 in the plurality of interdigital structures440, and the part of the interdigital structures respectively protrudefrom the two edges of the outer contour of the main body part 280 closeto the two ends of the respective channel to facilitate patterning thefirst touch sub-electrode 411 and the dummy electrode 430, and thepatterns of the formed touch sub-pixels and dummy electrode are regular,which is conducive to improving the uniformity of the touch performanceof the entire touch structure. For example, one first channel 281 istaken as an example here, and the same is suitable for at least onesecond channel 282. The extension direction of one first channel 281 inFIG. 8F is parallel to the extension direction of a part of interdigitalstructures 440 in the plurality of interdigital structures 440, the partof interdigital structures 440 respectively protrude from two edges 291a/291 b of the outer contour of the main body part 280 respectivelyclose to the two ends 281 a/281 b of the first channel 281. Of course,the interdigital structures 440 may be provided on each edge of theouter contour of the main body part 280, or may be provided only on apart of the edges of the outer contour of the main body part 280.Alternatively, in other embodiments, the extension direction of at leastone channel of one first touch sub-electrode 411 may not be parallel tothe extension direction of the at least part of interdigital structures440, which is not limited in the present disclosure.

For example, as shown in FIG. 8F, in the extension direction of onefirst channel 281, the two ends 281 a/281 b of the strip-shaped channel281 at least partially overlap with the interdigital structures 440respectively protruding from the two edges 291 a/291 b of the main bodypart 280 respectively close to the two ends 281 a/281 b of the firstchannel 281 (i.e., the two ends 281 a/281 b and the interdigitalstructures 440 respectively protruding from the two edges 291 a/291 bhave parts directly opposite to each other), and edges 281 c/281 d ofthe first channel 281 along the extension direction of the first channel281 are parallel to the edges 441/442 of the at least part ofinterdigital structures 440. The edges 281 c and 281 d of the firstchannel 281 along the extension direction of the first channel 281 areopposite to each other, and the edges 441 and 442 of the oneinterdigital structure 440 are opposite to each other.

In some embodiments, for example, as shown in FIG. 8F, the shape of theoverall outer contour of the whole structure constituted by the dummyelectrode 430, the plurality of first channels 281 and the plurality ofsecond channels 282 is an irregular polygon, so as to avoid the overallpattern of the dummy electrode 430 being a regular pattern, avoid thatthe shape of the overall outer contour of the above-mentioned wholestructure is the same as the shape of the display pixel unit of thedisplay panel adopting the touch control structure, and facilitate theelimination of moire. The first end and the second end of the outercontour of the dummy electrode 430 that are opposite to each other inthe second direction D2 are respectively opposite to two secondconnection electrodes adjacent in the second direction D2 (refer to FIG.2 ), and respectively have a first groove 4301 and a second groove 4303;the first groove 4301 is recessed toward the second end of the outercontour of the dummy electrode 430, and the second groove 4303 isrecessed toward the first end of the outer contour of the dummyelectrode 430. The third end and the fourth end of the outer contour ofthe dummy electrode 430 that are opposite each other in the firstdirection D1 are respectively opposite to the first connection electrode(refer to FIG. 2 ), and respectively have a third groove 4305 and afourth groove 4307; the third groove 4305 is recessed toward the fourthend, and the fourth groove 4307 is recessed toward the third end. Forexample, the outer contour of the dummy electrode 430 includes a firstprotrusion 4302 in the first groove 4301, a second protrusion 4304 inthe second groove 4303, a third protrusion 4306 in the third groove4305, and a fourth protrusion 4308 in the fourth groove 4307. The firstprotrusion 4302 protrudes in a direction away from the second end of theouter contour of the dummy electrode 430, and the second protrusion 4304protrudes in a direction away from the first end of the outer contour ofthe dummy electrode 430; the third protrusion 4306 protrudes in adirection away from the fourth end, and the fourth protrusion 4308protrudes in a direction away from the third end. The groove andprotrusion design of the outer contour of the dummy electrode 430 canobtain a better technical effect of eliminating the moire.

In other embodiments, for example, as shown in FIG. 8G, at least onetouch sub-electrode includes a plurality of the strip-shaped channels,and the plurality of strip-shaped channels include a plurality ofstrip-shaped first channels 281 and a plurality of strip-shaped secondchannels 282. The plurality of strip-shaped first channels 281 extendsubstantially along the first extension direction (for example, thethird direction D3) and are spaced apart from each other. The pluralityof strip-shaped second channels 282 extend substantially along thesecond extension direction (for example, the fourth direction D4) andare paced apart from each other, and each of the plurality ofstrip-shaped second channels 282 intersects each of the plurality ofstrip-shaped first channels 281; the dummy electrode 430 includes aplurality of parts separated from each other by the plurality ofstrip-shaped first channels 281 and the plurality of strip-shaped secondchannels 282.

In combination with FIG. 8G and FIG. 8H, one first channel 281 includesa plurality of narrow parts 2811 and a plurality of wide parts 2810alternately arranged and sequentially connected in the extensiondirection of the one first channel 281, and the width w1 of each narrowpart 2811 in the direction perpendicular to the extension direction ofthe first channel 281 is less than the width w2 of each wide part 2810in the direction perpendicular to the extension direction of the firstchannel 281, to avoid the possible shadow elimination problem caused bythe entire dummy electrode 430 being disconnected by the continuouschannel with the same width. One second channel 282 includes a pluralityof narrow parts 2821 and a plurality of wide parts 2820 alternatelyarranged and sequentially connected in the extension direction of theone second channel 282, and the width of each narrow part 2821 in thedirection perpendicular to the extension direction of the second channel282 is less than the width of each wide part 2820 in the directionperpendicular to the extension direction of the second channel 282, toavoid the possible shadow elimination problem caused by the entire dummyelectrode 430 being disconnected by the continuous channel with the samewidth. It should be noted that the width w1 here refers to the averagewidth of the narrow part 2811, and the width w2 refers to the averagewidth of the wide part 2810. Similarly, this is suitable for the narrowpart of the second channel 282 and the wide part of the second channel282.

It should be noted that the feature like “the plurality of narrow partsand the plurality of wide parts of one first channel 281 are alternatelyarranged” means that the plurality of narrow parts include a firstnarrow part, a second narrow part and a third narrow part, and theplurality of wide parts include a first wide part and a second widepart; the first wide part and the second wide part are respectivelylocated on two sides of the first narrow part and both are adjacent tothe first narrow part, the second narrow part is located on the side ofthe first wide part away from the first narrow part and adjacent to thefirst wide part, and the third narrow part is located on the side of thesecond wide part away from the first narrow part and adjacent to thesecond wide part. The same is suitable for the alternating arrangementof the plurality of narrow parts and the plurality of wide parts of thesecond channel 282.

For example, the narrow part 2811 of the first channel 281 intersectswith the narrow part 2821 of the second channel 282. In this way, thesize of the channel at the intersection of the first channel 281 and thesecond channel 282 cannot be too large, so as to avoid the phenomenonthat the channel is too wide at the intersection and is too narrow atthe narrow part, and avoid uneven touch accuracy in the entire regionwhere the dummy electrode 430 is arranged.

For example, as shown in FIG. 8G and FIG. 8H, the narrow part 2811 ofthe first channel 281 and the narrow part 2821 of the second channel 282have an intersection (that is, the position indicated by the dottedcircle in FIG. 8H). The first channel 281 includes a first wide part2810 a and a second wide part 2810 b respectively located on two sidesof the intersection and adjacent to the intersection, the second channel282 includes a third wide part 2820 a and a fourth wide part 2820 blocated on two sides of the intersection and adjacent to theintersection; the distances respectively from the first wide part 2810a, the second wide part 2810 b, the third wide part 2820 a and thefourth wide part 2820 b to the intersection are equal, so as to improveuniformity and reliability of the touch accuracy of the entire regionwhere the dummy electrode 430 is arranged, and enable the entire touchstructure to have more uniform and stable touch performance.

For example, for the first channel 281, the ratio of the length 11 ofthe narrow part 2811 in the extension direction of the first channel 281to the width w/of the narrow part 2811 is greater than the ratio of thelength 12 of the wide part 2810 in the extension direction of the firstchannel 281 to the width w2 of the wide part 2810. Similarly, for thesecond channel 282, the ratio of the length of the narrow part 2821 inthe extension direction of the second channel 282 to the width of thenarrow part 2821 is greater than the ratio of the length of the widepart 2820 in the extension direction of the second channel 282 to thewidth of the wide part 2820.

For example, for the first channel 281, the length of the narrow part2811 is equal to or not equal to the length of the wide part 2810. Inthese two cases, the above conditions for the length-width ratio of thenarrow part and the wide part of the first channel 281 can be satisfied;similarly, for example, for the second channel 282, the length of thenarrow part 2821 is equal to or not equal to the length of the wide part2820. In these two cases, the above conditions for the length-widthratio of the narrow part and the wide part of the second channel 282 canbe satisfied.

For example, as shown in FIG. 8G and FIG. 8H, for the first channel 281,the plurality of wide parts 2810 are arranged at equal intervals, andthe lengths of the plurality of narrow parts 2811 are equal to eachother; for the second channel 282, the plurality of wide parts 2820 arearranged at equal intervals, and the lengths of the plurality of narrowparts 2821 are equal to each other.

For example, as shown in FIG. 2 , the touch structure 40 provided by theembodiments of the present disclosure includes a first electrode layerand a second electrode layer. An insulation layer is arranged betweenthe first electrode layer and the second electrode layer; the pluralityof touch sub-electrodes include a plurality of first touchsub-electrodes 411 and a plurality of second touch sub-electrodes 421,and the touch structure 40 further includes a plurality of firstconnection electrodes 412 and a plurality of second connectionelectrodes (not shown in FIG. 2 , the position of the plurality ofsecond connection electrodes is the same as the position of the secondconnection electrodes in the previous embodiment); the plurality offirst touch sub-electrodes 411 and the plurality of first connectionelectrodes 412 are all located in the first electrode layer and arrangedalong the first direction D1, the plurality of first touchsub-electrodes 411 and the plurality of first connection electrodes 412are alternately distributed one by one and electrically connected insequence, to form a first touch electrode 410 extending along the firstdirection D1; the plurality of second touch sub-electrodes 421 arelocated in the first electrode layer, and are arranged in sequence alongthe second direction D2 and spaced apart from each other, the firstdirection D1 intersects the second direction D2, and each of theplurality of first touch sub-electrodes 411 and each of the plurality ofsecond touch sub-electrodes 421 are spaced apart from each other; theplurality of second connection electrodes are located in the secondelectrode layer and are spaced apart from each other. Each of theplurality of second connection electrodes is electrically connected withthe adjacent second touch sub-electrodes through vias in the insulationlayer, so as to electrically connect the adjacent second touchsub-electrodes 421 to form a second touch electrode 421 extending in thesecond direction D2. The dummy electrode 430 is embedded in the firsttouch sub-electrode 411 and/or in the second touch sub-electrode 421.For example, the dummy electrode 430 may be any one dummy electrode ofthe above embodiments. Moreover, it should be noted that the first touchsub-electrode 411 shown in FIGS. 8A-8G may be in the touch structure 40provided by any one of the above embodiments.

FIG. 8I is an eighth structural diagram of a dummy electrode embedded ina touch self-electrode provided by an embodiment of the presentdisclosure, and FIG. 8J is an enlarged schematic diagram of a part F inFIG. 8I. The difference between the embodiment shown in FIG. 8I and theembodiment shown in FIG. 8F is that, as shown in FIG. 8I, at least onetouch sub-electrode includes a communication part 285, and the pluralityof strip-shaped channels 281/282 are electrically connected to eachother through the communication part 285, the plurality of parts of thedummy electrode, such as the first part 431, the second part 432, thethird part 433, the fourth part 434, the fifth part 435, the sixth part436, the seventh part 437, and the eighth part 438, surround thecommunication part 285. In this way, compared with the case that thecommunication part is not provided, the communication between theplurality of channels 281/282 is better, which is conducive to improvingthe accuracy and reliability of touch control.

In some embodiments, for example, as shown in FIG. 9A, the firstelectrode layer and the second electrode layer are respectively theabove first metal grid layer and the second metal grid layer. Thus, theplurality of touch sub-electrodes and the dummy electrode 430 arelocated in the first metal grid layer, that is, the plurality of touchsub-electrodes and the dummy electrode are located in the same metalgrid layer. Each part of the main body part 280, each channel 281/282and the dummy electrode 430 respectively includes a plurality of firstmetal grids 52. For example, each of the plurality of parts of the dummyelectrode 430 that are separated from each other by the channelsincludes a plurality of first metal grids 52 connected with each other.

For example, as shown in FIG. 8I, the communication part 285 furtherincludes a plurality of first metal grids 52. For example, the firstmetal grids 52 of the plurality of strip-shaped channels 281/282 and thefirst metal grids 52 of the communication part 285 are connected witheach other, so that the plurality of strip-shaped channels 281/282 areelectrically connected with each other through the communication part285.

For example, as shown in FIG. 9A, in at least one touch sub-electrodeembedded with the dummy electrode 430, each part of the dummy electrode430 has a boundary region with the first touch sub-electrode 411.Schematically, the boundary region is a white region surrounding eachpart of the dummy electrode 430 in FIGS. 8A-8H. FIG. 9B is an enlargedschematic diagram of a part D in FIG. 9A, and FIG. 9C is an enlargedschematic diagram of a part E in FIG. 9B. In combination with FIG. 9Band FIG. 9C, the plurality of first metal lines 52 located in theboundary region respectively include a plurality of openings 4300. Eachof the plurality of openings 4300 separates the first metal line 52 intotwo metal segments. One of the two metal segments belongs to the channel282 of the first touch sub-electrode 411 (taking the second channel 282as an example), and the other of the two metal segments belongs to thedummy electrode 430, thus, the dummy electrode 430 is insulated from thechannel 282 of the first touch sub-electrode 411. FIG. 9C illustratesthe enlargement of the second channel 282 as an example, the same issuitable for the first channel 281. In the boundary region between eachpart of the dummy electrode 430 and the main body part 280 of the firsttouch sub-electrode 411, each part of the dummy electrode 430 isseparated from the main body part 280 through a similar plurality ofopenings, so as to insulate them.

For example, each space 4300 is located at the midpoint of the firstmetal line segment (i.e., one side of the first grid disconnected by thespace 4300), so that the position of the space is more regular to reducethe patterning difficulty, which is very important to improve theproduct qualification rate and save the mask cost.

For example, as shown in FIG. 9C, each first channel 281 and each secondchannel 282 include at least two conductor lines composed of a pluralityof first metal lines 51 connected with each other. For example, the twoconductor lines are a first conducting line 283 a and a secondconducting line 283 b, respectively. Both the first conducting line 283a and the second conducting line 283 b pass through the dummy electrode430 and are respectively connected with the main body part 280 of thefirst touch sub-electrode 411 at two ends thereof in the respectiveextension direction, so as to ensure that each first channel 281 andeach second channel 282 can provide at least two electrical signaltransmission channels, to solve the problem that the signal transmissionin the first channel 281 or the second channel 282 is affected when asingle signal transmission channel is disconnected, and ensure thereliability of signal transmission.

For example, as shown in FIG. 9B and FIG. 9C, each first channel 281 andeach second channel 282 include at least one first metal grid 52arranged in their width direction, the width direction of the firstchannel 281 is perpendicular to the extension direction of the firstchannel 281, and the width direction of the second channel 282 isperpendicular to the extension direction of the second channel 282.

For example, each channel 281/282 includes a plurality of seriesconnected metal grids arranged along the respective extension directionof the each channel 281/282; alternatively, each channel 281/282includes a plurality of metal grids arranged along the respectiveextension direction of the each channel 281/282 and a metal connectionline connecting at least two adjacent metal grids.

FIG. 9D is an enlarged schematic diagram of a part including a dummyelectrode in FIG. 9A. As shown in FIG. 9D, for example, at least onestrip-shaped channel 282 includes a first segment 2821 and a secondsegment 2822 arranged along the extension direction of the at least onestrip-shaped channel 282. The first segment 2821 and the second segment2822 are substantially parallel to each other, that is, the firstsegment 2821 and the second segment 2822 are not on the same straightline, and the first segment 2821 and the second segment 2822 areelectrically connected through the above-mentioned first metalconnection line 51.

The embodiments of the disclosure further provide a touch panel, whichincludes any of the above touch structures.

FIG. 10 is a schematic diagram of a touch panel provided by at least oneembodiment of the present disclosure. As shown in FIG. 10 , the touchpanel 80 includes a touch region 301 and a non-touch region 302 outsidethe touch region 301, and the touch structure 40 is located in the touchregion 301. For example, the first touch electrode 410 extends along thewidth direction of the rectangle, and the second touch electrode 420extends along the length direction of the rectangle. For clarity, thestructures of the first touch electrode and the second touch electrodeare not shown in detail in the figure. In other embodiments, the firsttouch electrode 410 may extend along the length direction of therectangle, and the second touch electrode 420 may extend along the widthdirection of the rectangle.

For example, as shown in FIG. 10 , the touch panel 80 further includes aplurality of signal lines 450 located in the non-touch region 302. Eachfirst touch electrode 410 and each second touch electrode 420 areelectrically connected to a signal line 450, respectively, and connectedto a touch controller or a touch integrated circuit (not shown in thefigure) through the signal line. For example, the first touch electrode410 is a touch driving electrode and the second touch electrode 420 is atouch sensing electrode. However, the embodiments of the presentdisclosure are not limited in this aspect.

The touch integrated circuit is, for example, a touch chip, which isused to provide a touch driving signal to the second touch electrode 420in the touch panel 80, receive a touch sensing signal from the firsttouch electrode 410 and process the touch sensing signal, for example,provide the processed data/signal to the system controller to realizethe touch sensing function.

For example, as shown in FIG. 10 , ends of the plurality of signal lines450 connected with the touch integrated circuit may be arranged on thesame side of the touch region 301 (for example, the lower side in FIG.10 ), which can facilitate the connection with the touch integratedcircuit.

For example, as shown in FIG. 10 , because the second touch electrode420 is longer than the first touch electrode 410 and has a larger load,in order to improve the signal transmission speed, one signal line 450can be provided at each of the two ends of one first touch electrode410. During operation, the touch integrated circuit simultaneouslyinputs a touch drive signal from two directions to one second touchelectrode 420 through two signal lines 450 (bilateral drive), so thatthe speed of signal loading on the second touch electrode 420 isincreased, and the detection speed can be improved.

For example, the material of the first metal grid layer 50 or the secondmetal grid layer 60 includes metal materials such as aluminum,molybdenum, copper and silver, or alloy materials of these metalmaterials, such as silver palladium copper alloy (APC) materials.

For example, the width (size along the length direction of the metalline) of each space is 5.2 microns.

For example, the material of the insulation layer 70 may be an inorganicinsulation material, for example, the inorganic insulation material maybe a transparent material. For example, the inorganic insulationmaterial is an oxide of silicon, a nitride of silicon or a nitrogenoxide of silicon, such as silicon oxide, silicon nitride or siliconoxynitride, or an insulation material such as aluminum oxide andtitanium nitride including a metal nitrogen oxide.

For example, the material of the insulation layer 70 may be an organicinsulation material to obtain good bending resistance. For example, theorganic insulation material is a transparent material. For example, theorganic insulation material is OCA optical adhesive. For example, theorganic insulation material may include polyimide (PI), acrylate, epoxyresin, polymethylmethacrylate (PMMA), etc.

FIG. 11A is a schematic planar diagram of a touch display panel 30provided by at least one embodiment of the present disclosure; and FIG.11B is a cross-sectional diagram taken along a section line in FIG. 11A.

Referring to FIG. 11A and FIG. 11B, the touch display panel 30 includesa base substrate 31, a display structure 32 and the touch structure 40that are sequentially stacked on the base substrate 31. The touchstructure 40 is located on the side of the display structure 32 awayfrom the base substrate 31 and closer to the user during use.

For example, in this embodiment, as an example, the display panel is anOLED display panel. Of course, in other embodiments, the display panelmay be a liquid crystal display panel, such as an on-cell or in-celltouch display panel. The embodiments of the present disclosure do notlimit the specific type of the display panel adopting the touchstructure provided by the embodiments of the present disclosure.

For example, the display structure 32 includes a plurality of sub-pixelsarranged in an array, for example, the pixel array is arranged along thefirst direction D1 and the second direction D2. For example, the touchdisplay panel is an OLED display panel, and the plurality of sub-pixelsinclude a green sub-pixel (G), a red sub-pixel (R), and a blue sub-pixel(B). Each sub-pixel includes a light-emitting element 23 and a pixeldriving circuit that drives the light-emitting element 23 to emit light.The embodiments of the present disclosure do not limit the type andspecific composition of the pixel driving circuit. For example, thepixel driving circuit may be a current driving type or a voltage drivingtype, may be a 2T1C (i.e., two transistors and a capacitor, the twotransistors include a driving transistor and a data writing transistor)driving circuit, and may further include a compensation circuit(compensation transistor), a light-emitting control circuit(light-emitting control transistor), a reset circuit (reset transistor),and the like on the basis of the 2T1C driving circuit.

For clarity, FIG. 11B shows only the first transistor 24 in the pixeldriving circuit that is directly electrically connected to thelight-emitting element 23. The first transistor 24 may be a drivingtransistor configured to operate in a saturated state and control themagnitude of the current that drives the light-emitting element 23 toemit light. For another example, the first transistor 24 may be alight-emitting control transistor for controlling whether a currentdriving the light-emitting element 23 to emit light flows. Theembodiments of the present disclosure do not limit the specific type ofthe first transistor.

For example, the light-emitting element 23 is an organic light-emittingdiode, which includes a first electrode 231, a light-emitting layer 233,and a second electrode 232. One of the first electrode 231 and thesecond electrode 232 is an anode and the other is a cathode. Forexample, the first electrode 231 is an anode and the second electrode232 is a cathode. For example, the light-emitting layer 233 is anorganic light-emitting layer or a quantum dot light-emitting layer. Forexample, the light-emitting element 23 may include, in addition to thelight-emitting layer 233, an auxiliary function layer such as a holeinjection layer, a hole transport layer, an electron injection layer,and an electron transport layer. For example, the light-emitting element23 is a top emitting structure, the first electrode 231 is reflectiveand the second electrode 232 is transmissive or semi-transmissive. Forexample, the first electrode 231 adopts a high work function material toact as an anode, for example, an ITO/Ag/ITO stacked structure; thesecond electrode 232 adopts a low work function material to act as acathode, such as a semi-transmissive metal or metal alloy material, suchas an Ag/Mg alloy material.

The first transistor 24 includes a gate electrode 341, a gate insulationlayer 342, an active layer 343, a first electrode 344 and a secondelectrode 345, the second electrode 345 is electrically connected to thefirst electrode 231 of the light-emitting element 23. The embodiments ofthe present disclosure do not limit the type, material and structure ofthe first transistor 24, for example, it may be a top gate type, abottom gate type, etc., the active layer 343 of the first transistor 24may be amorphous silicon, polycrystalline silicon (low-temperaturepolycrystalline silicon and high-temperature polycrystalline silicon),oxide semiconductor (for example, indium gallium tin oxide (IGZO)),etc., and the first transistor 24 may be in N-type or P-type.

The transistors adopted in the embodiments of the present disclosure maybe thin film transistors, field effect transistors or other switchingdevices with the same characteristics. The embodiments of the presentdisclosure are illustrated by taking the thin film transistor as anexample. The source electrode and drain electrode of the transistor usedhere may be symmetrical in structure, so there is no difference instructure between the source electrode and the drain electrode. In theembodiments of the present disclosure, in order to distinguish the twoelectrodes of the transistor other than the gate electrode, it isdirectly described that one electrode is the first electrode and theother is the second electrode.

As shown in FIG. 11A and FIG. 11B, the display structure 32 furtherincludes a pixel definition layer 320, the pixel definition layer 320 isarranged on the first electrode 231 of the light-emitting element 23, inwhich a plurality of openings 321 are formed and the first electrodes231 of the plurality of sub-pixels are exposed respectively, therebydefining the pixel opening region of each sub-pixel, and thelight-emitting layer of the sub-pixel is formed in the pixel openingregion, the second electrode 232 is formed as a common electrode (thatis, shared by a plurality of sub-pixels). FIG. 11A illustrates a pixelopening region 310 of a green sub-pixel, a pixel opening region 320 of ared sub-pixel, and a pixel opening region 330 of a blue sub-pixel.

FIG. 11B does not show the patterns in the second touch electrode layer402. For example, the second touch electrode layer 402 is located on theside of the first touch electrode layer 401 close to the base substrate31.

The orthographic projections of the plurality of first metal lines 51 inthe first touch electrode layer 401 and the plurality of second metallines 61 in the second touch electrode layer 402 on the base substrate31 are located outside the orthographic projections of the pixel openingregions of the plurality of sub-pixels on the base substrate 31, thatis, located inside the orthographic projections of the pixel separationregions between the pixel opening regions on the base substrate 31, thepixel separation regions are the non-opening regions 322 of the pixeldefinition layer 320. The pixel separation region is used to separatethe pixel opening regions of the plurality of sub-pixels and separatethe light-emitting layer of each sub-pixel to prevent color mixing.

For example, the grids of the first metal grid 52 or the second metalgrid 62 covers at least one pixel opening region. For example, the gridopenings of the first metal grid 52 or the second metal grid 62 coversthe pixel opening regions 310 of the two green sub-pixels, which arearranged in pairs and arranged side by side in the second direction D2.

As shown in FIG. 11B, the display structure 32 further includes anencapsulation layer 33 between the light-emitting element 23 and thetouch structure 20. The encapsulation layer 33 is configured to seal thelight-emitting element 23 to prevent external moisture and oxygen frompenetrating the light-emitting element and the driving circuit,resulting in damage to devices such as the light-emitting element 23.For example, the encapsulation layer 33 may be a single-layer structureor a multi-layer structure, for example, the encapsulation layer 33includes an organic film, an inorganic film, or a multi-layer structureincluding an organic film and an inorganic film alternately stacked.

For example, as shown in FIG. 11B, the touch display panel 30 furtherincludes a buffer layer 22 between the display structure 32 and thetouch structure 20. For example, the buffer layer 22 is formed on theencapsulation layer 33 to improve the adhesion between the touchstructure 40 and the display structure 32. For example, the buffer layer22 is an inorganic insulation layer. For example, the material of thebuffer layer 22 may be silicon nitride, silicon oxide or nitrogen oxideof silicon. For example, the buffer layer 22 may include a structure inwhich a silicon oxide layer and a silicon nitride layer are alternatelystacked.

For example, lengths of different edges of the first metal grid 52 ofthe first touch electrode layer 401 are different, and similarly,lengths of edges of different second metal grids 62 of the second touchelectrode layer 402 are different. For example, the sum of the lengthsof the second metal lines of the second metal grid 62 overlapping withthe first metal lines 51 is the smallest. For example, the edges of themarked edges a, b, c, d, e, and f in FIG. 11A represent the first metallines 51 overlapped with the second metal line. When the number of thefirst metal lines 51 overlapped with the second metal line is equal, thesum of the lengths of these first metal lines 51 overlapped with thesecond metal line in the embodiments of the present disclosure is thesmallest.

At least one embodiment of the present disclosure further provides anelectronic device, the electronic device includes the touch displaypanel 30. For example, the electronic device is a display device, suchas an OLED display device or a liquid crystal display device.

For example, the electronic device can be any product or component witha display function and a touch control function, such as a display, anOLED panel, an OLED TV, an electronic paper, a mobile phone, a tabletcomputer, a notebook computer, a digital photo frame, a navigator, etc.

What have been described above are only specific implementations of thepresent disclosure, the protection scope of the present disclosure isnot limited thereto. The protection scope of the present disclosureshould be based on the protection scope of the claims.

1. A touch structure, comprising a first metal grid layer and a secondmetal grid layer, wherein an insulation layer is between the first metalgrid layer and the second metal grid layer, the first metal grid layercomprises a plurality of first metal grids defined by a plurality offirst metal lines, and the second metal grid layer comprises a pluralityof second metal grids defined by a plurality of second metal lines,shapes of each of the plurality of first metal grids and each of thesecond metal grids are both polygons; the first metal grid layercomprises a plurality of first touch sub-electrodes and a plurality offirst connection electrodes arranged along a first direction, theplurality of first touch sub-electrodes and the plurality of firstconnection electrodes are alternately distributed one by one and areelectrically connected in sequence to constitute a first touch electrodeextending along the first direction; the first metal grid layer furthercomprises a plurality of second touch sub-electrodes arranged insequence along the second direction and spaced apart from each other,and the first direction intersects the second direction; each of theplurality of first touch sub-electrodes and each of the second touchsub-electrodes are spaced apart from each other, and respectivelycomprise a plurality of the first metal grids; the second metal gridlayer comprises a plurality of second connection electrodes spaced apartfrom each other, each of the plurality of second connection electrodesis electrically connected with adjacent second touch sub-electrodesthrough a plurality of vias in the insulation layer, so as toelectrically connect the adjacent second touch sub electrodes to form asecond touch electrode extending in the second direction; each of theplurality of second connection electrodes along the second directioncomprises: a first metal grid row, comprising a plurality of the secondmetal grids arranged along the first direction; and a second metal gridrow, adjacent to and connected with the first metal grid row, arrangedin the second direction with the first metal grid row, and comprising atleast one second metal grid among the plurality of second metal gridsarranged along the first direction, wherein a count of the at least onesecond metal grid in the second metal grid row is less than or equal toa count of the second metal grids in the first metal grid row, and allthe second metal lines of the at least one second metal grid in thesecond metal grid row close to the first metal grid row are sharingsecond metal lines shared with the second metal grid in the first metalgrid row.
 2. The touch structure according to claim 1, wherein the firstmetal grid row is electrically connected with the second touchsub-electrode adjacent to the first metal grid row, and orthographicprojections of the sharing second metal lines shared with the secondmetal grid in the first metal grid row on the first metal grid layeroverlap with the first metal lines.
 3. The touch structure according toclaim 1, wherein the count of the second metal grids in the first metalgrid row is 2, and the count of the at least one second metal grid inthe second metal grid row is
 1. 4. The touch structure according toclaim 1, wherein the plurality of vias comprise a first via, and thefirst metal grid row is electrically connected with one of two secondtouch sub-electrodes adjacent to the second connection electrode inwhich the first metal grid row is located through the first via.
 5. Thetouch structure according to claim 4, wherein orthographic projectionsof a plurality of second metal lines of the second metal grids of thefirst metal grid row on the first metal grid layer respectively overlapwith a plurality of first metal lines of the first metal grids of thesecond touch sub-electrode, so that the second metal grids of the firstmetal grid row has a plurality of vertices overlapped with the firstmetal grids of the second touch sub-electrode, and the plurality ofvertices comprise a plurality of connection vertices, the first via iscorrespondingly arranged at the plurality of connection vertices.
 6. Thetouch structure according to claim 5, wherein the shapes of each of theplurality of first metal grids and each of the second metal grids areboth hexagons; the plurality of second metal lines of the second metalgrids of the first metal grid row respectively overlap with four firstmetal lines of an edge first metal grid of a second touch sub-electrodeadjacent to the first metal grid row in a direction perpendicular to thesecond metal grid layer, so that the edge first metal grid has fivevertices overlapped with the second metal grids of the first metal gridrow, and the edge first metal grid is the first metal grid at an edge ofthe second touch sub-electrode adjacent to the first metal grid row; thefour first metal lines sequentially connect the five vertices to be in aW shape, the four first metal lines respectively intersect both thefirst direction and the second direction, and at least one of the fivevertices is the connection vertex.
 7. The touch structure according toclaim 6, wherein the plurality of the second metal grids of the firstmetal grid row are first edge second metal grids at a first edge of thesecond connection electrode, and are located at a first end of thesecond connection electrode in the second direction, and areelectrically connected with the edge first metal grid of the secondtouch sub-electrode adjacent to the first metal grid row.
 8. The touchstructure according to claim 4, wherein each of the plurality of secondconnection electrodes further comprises: a third metal grid row, on aside of the second metal grid row away from the first metal grid row,and comprising a plurality of the second metal grids arranged along thefirst direction; and a fourth metal grid row, on a side of the thirdmetal grid row close to the second metal grid row, adjacent to andconnected with the third metal grid row, and comprising at least onesecond metal grid among the plurality of second metal grids arrangedalong the first direction, wherein a count of the at least one secondmetal grid in the fourth metal grid row is less than or equal to a countof the second metal grids in the third metal grid row, and all thesecond metal lines of the at least one second metal grid in the fourthmetal grid row close to the third metal grid row are sharing secondmetal lines shared with the second metal grid in the third metal gridrow, the second metal grid of the third metal grid row is a second edgesecond metal grid of the second connection electrode at a second edge ofthe second connection electrode, is located at a second end of thesecond connection electrode in the second direction, and is electricallyconnected with the edge first metal grid of the second touchsub-electrode adjacent to the third metal grid row, and the second endis opposite to the first end in the second direction; the plurality ofvias comprise a second via, and the third metal grid row is electricallyconnected with other one of the two second touch sub-electrodes adjacentto the second connection electrode in which the third metal grid row islocated through the second via.
 9. The touch structure according toclaim 8, wherein orthographic projections of the sharing second metallines shared with the second metal grid in the third metal grid row onthe first metal grid layer do not overlap with the first metal lines, orthe orthographic projections of the sharing second metal lines sharedwith the second metal grid in the third metal grid row on the firstmetal grid layer overlap with the first metal lines.
 10. The touchstructure according to claim 8, wherein the count of the second metalgrids in the third metal grid row is 2, and the count of the at leastone second metal grid in the fourth metal grid row is
 1. 11. The touchstructure according to claim 8, wherein the second connection electrodefurther comprises at least one intermediate metal grid row between thesecond metal grid row and the fourth metal grid row, each row of the atleast one intermediate metal grid row comprises at least one secondmetal grid among the plurality of second metal grids.
 12. The touchstructure according to claim 11, wherein a count of the at least onesecond metal grid in each row of the at least one intermediate metalgrid row is
 1. 13. The touch structure according to claim 4, whereineach of the plurality of second connection electrodes further comprises:a third metal grid row, on a side of the second metal grid row away fromthe first metal grid row, adjacent to the second metal grid row, andcomprising a plurality of the second metal grids arranged along thefirst direction, wherein the count of the at least one second metal gridin the second metal grid row is less than or equal to a count of thesecond metal grids in the third metal grid row, and all second metallines of the at least one second metal grid in the second metal grid rowclose to the third metal grid row are sharing second metal lines sharedwith the second metal grid in the third metal grid row, the second metalgrids of the third metal grid row is a second edge second metal grid ofthe second connection electrode at a second edge of the secondconnection electrode, is located at a second end of the secondconnection electrode in the second direction, and is electricallyconnected with an edge first metal grid of the second touchsub-electrode adjacent to the third metal grid row, the second end isopposite to the first end in the second direction, and the edge firstmetal grid is the first metal grid at an edge of the second touchsub-electrode adjacent to the third metal grid row; the plurality ofvias comprise a second via, and the third metal grid row is electricallyconnected with other one of the two second touch sub-electrodes adjacentto the second connection electrode in which the third metal grid row islocated through the second via.
 14. The touch structure according toclaim 1, wherein a pattern of each of the plurality of second connectionelectrodes is symmetrical with respect to a symmetry axis extendingalong the first direction.
 15. The touch structure according to claim 1,wherein each of the second metal grids comprises at least two verticaledges extending along the second direction, and orthographic projectionsof the at least two vertical edges on the first metal grid layer do notoverlap with the first metal line.
 16. The touch structure according toclaim 1, wherein adjacent second touch sub-electrodes among theplurality of second touch sub-electrodes are electrically connectedthrough two of the second connection electrodes, and the two of thesecond connection electrodes are spaced apart from each other; anorthographic projection of each of the plurality of first connectionelectrodes on the second metal grid layer is in a gap between the two ofthe second connection electrodes connecting the adjacent second touchsub-electrodes.
 17. The touch structure according to claim 16, whereineach of the plurality of first touch sub-electrodes is electricallyconnected with an adjacent first connection electrode through at leastone first connection line constituted by a plurality of first metallines connected end to end in sequence; an orthographic projection ofthe first connection line on the second metal grid layer respectivelyoverlaps with a plurality of second metal lines in the second connectionelectrode, and the first connection line at least partially overlapswith an orthographic projection of the sharing second metal line on thefirst metal grid layer.
 18. The touch structure according to claim 1,wherein a plurality of the first metal lines located in a boundaryregion between adjacent first touch sub-electrode and the second touchsub-electrode respectively comprise a plurality of openings, each of theplurality of openings divides the first metal line into two first metalsegments, one of the two first metal line segments belongs to the firsttouch sub-electrode and other one of the two first metal line segmentsbelongs to the second touch sub-electrode, so that the adjacent firsttouch sub-electrode and the second touch sub-electrode are insulatedfrom each other.
 19. A touch display panel, comprising a base substrate,a display structure and the touch structure according to claim 1 thatare stacked on the base substrate.
 20. (canceled)
 21. An electronicdevice, comprising the touch structure according to claim 1.